EXHIBIT 10.8

[LOGO]  BANK OF AMERICA                                  BUSINESS LOAN AGREEMENT
        National Trust and Savings Association
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This Agreement dated as of January 23, 1996, is between Bank of America
                                   --                                  
National Trust and Savings Association (the "Bank") and Unit Instruments, Inc.
(the "Borrower").

1.   LINE OF CREDIT AMOUNT AND TERMS

1.1  LINE OF CREDIT AMOUNT.

(a)  During the availability period described below, the Bank will provide a
     line of credit to the Borrower. The amount of the line of credit (the
     "Commitment") is Five Million Dollars ($5,000,000).

(b)  This is a revolving line of credit with within line facilities for letters
     of credit. During the availability period, the Borrower may repay principal
     amounts and reborrow them.

(c)  The Borrower agrees not to permit the outstanding principal balance of the
     line of credit plus the outstanding amounts of any letters of credit,
     including amounts drawn on letters of credit and not yet reimbursed, to
     exceed the Commitment.

1.2  AVAILABILITY PERIOD.  The line of credit is available between the date of
this Agreement and January 31, 1997 (the "Expiration Date") unless the Borrower
is in default.

1.3  INTEREST RATE.

(a)  Unless the Borrower elects an optional interest rate as described below,
     the interest rate is the Bank's Reference Rate.

(b)  The Reference Rate is the rate of interest publicly announced from time to
     time by the Bank in San Francisco, California, as its Reference Rate. The
     Reference Rate is set by the Bank based on various factors, including the
     Bank's costs and desired return, general economic conditions and other
     factors, and is used as a reference point for pricing some loans. The Bank
     may price loans to its customers at, above, or below the Reference Rate.
     Any change in the Reference Rate shall take effect at the opening of
     business on the day specified in the public announcement of a change in the
     Bank's Reference Rate.

1.4  REPAYMENT TERMS.

(a)  The Borrower will pay interest on February 29, 1996, and then monthly
     thereafter until payment in full of any principal outstanding under this
     line of credit.

(b)  The Borrower will repay in full all principal and any unpaid interest or
     other charges outstanding under this line of credit no later than the
     Expiration Date.

(c)  Any amount bearing interest at an optional interest rate (as described
     below) may be repaid at the end of the applicable interest period, which
     shall be no later than the Expiration Date.

1.5  OPTIONAL INTEREST RATES.  Instead of the interest rate based on the Bank's
     Reference Rate, the Borrower may elect to have all or portions of the line
     of credit (during the availability period) bear interest at the rate(s)
     described below during an interest period agreed to by the Bank and the
     Borrower. Each interest rate is a rate per year. Interest will be paid on
     the last day of each interest period, and, if the interest period is longer
     than a month, then on the last day each month during the interest period.
     At the end of any interest period, the

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interest rate will revert to the rate based on the Reference Rate, unless the
Borrower has designated another optional interest rate for the portion.

1.6  OFFSHORE RATE. The Borrower may elect to have all or portions of the
principal balance of the line of credit bear interest at the Offshore Rate plus
one and one-half (1.50) percentage points.

Designation of an Offshore Rate portion is subject to the following
requirements:

(a)  The interest period during which the Offshore Rate will be in effect will
     be 30, 60, 9O or 180 days. The last day of the interest period will be
     determined by the Bank using the practices of the offshore dollar inter-
     bank markets.

(b)  Each Offshore Rate portion will be for an amount not less than Five Hundred
     Thousand Dollars ($500,000).

(c)  The "Offshore Rate" means the interest rate determined by the following
     formula, rounded upward to the nearest 1/100 of one percent. (All amounts
     in the calculation will be determined by the Bank as of the first day of
     the interest period.)

                  Offshore Rate =  Grand Cayman Rate
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                                   (1.00 - Reserve Percentage)

     Where,

     (i)  "Grand Cayman Rate" means the interest rate (rounded upward to the
          nearest 1/16th of one percent) at which the Bank's Grand Cayman
          Branch, Grand Cayman, British West Indies, would offer U.S. dollar
          deposits for the applicable interest period to other major banks in
          the offshore dollar inter-bank markets.

     (ii) "Reserve Percentage" means the total of the maximum reserve
          percentages for determining the reserves to be maintained by member
          banks of the Federal Reserve System for Eurocurrency Liabilities, as
          defined in the Federal Reserve Board Regulation D, rounded upward to
          the nearest 1/100 of one percent. The percentage will be expressed as
          a decimal, and will include, but not be limited to, marginal,
          emergency, supplemental, special, and other reserve percentages.

(d)  The Borrower may not elect an Offshore Rate with respect to any portion of
     the principal balance of the line of credit which is scheduled to be repaid
     before the last day of the applicable interest period.

(e)  Any portion of the principal balance of the line of credit already bearing
     interest at the Offshore Rate will not be converted to a different rate
     during its interest period.

(f)  Each prepayment of an Offshore Rate portion, whether voluntary, by reason
     of acceleration or otherwise, will be accompanied by the amount of accrued
     interest on the amount prepaid, and a prepayment fee equal to the amount
     (if any) by which

     (i)  the additional interest which would have been payable on the amount
          prepaid had it not been paid until the last day of the interest
          period, exceeds

     (ii) the interest which would have been recoverable by the Bank by placing
          the amount prepaid on deposit in the offshore dollar market for a
          period starting on the date on which it was prepaid and ending on the
          last day of the interest period for such portion.

(g)  The Bank will have no obligation to accept an election for an Offshore Rate
     portion if any of the following described events has occurred and is
     continuing:

     (i) Dollar deposits in the principal amount, and for periods equal to the
         interest period, of an Offshore Rate portion are not available in the
         offshore dollar inter-bank markets; or

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     (ii)  the Offshore Rate does not accurately reflect the cost of an Offshore
           Rate portion.
 
1.7  LETTERS OF CREDIT. This line of credit may be used for financing:

     (i)   commercial letters of credit with a maximum maturity of 180 days but
           not to extend more than 120 days beyond the Expiration Date.  Each
           commercial letter of credit will require drafts payable at sight.

     (ii)  standby letters of credit with a maximum maturity of 365 days but not
           to extend more than 120 days beyond the Expiration Date.

     (iii) The amount of the letters of credit outstanding at any one time,
           (including amounts drawn on the letters of credit and not yet
           reimbursed), may not exceed Five Million Dollars ($5,000,000).

The Borrower agrees:

(a)  any sum drawn under a letter of credit may, at the option of the Bank, be
     added to the principal amount outstanding under this Agreement. The amount
     will bear interest and be due as described elsewhere in this Agreement.

(b)  if there is a default under this Agreement, to immediately prepay and make
     the Bank whole for any outstanding letters of credit.

(c)  the issuance of any letter of credit and any amendment to a letter of
     credit is subject to the Bank's written approval and must be in form and
     content satisfactory to the Bank and in favor of a beneficiary acceptable
     to the Bank.

(d)  to sign the Bank's form Application and Agreement for Commercial Letter of
     Credit or Application and Agreement for Standby Letter of Credit.

(e)  to pay any standard issuance fee and/or other fees that the Bank notifies
     the Borrower will be charged for issuing and processing letters of credit
     for the Borrower except the issuance fee for standby letters of credit
     shall be one percent (1%) per annum of the face amount of each standby
     letter of credit issued.

(f)  to allow the Bank to automatically charge its checking account for
     applicable fees, discounts, and other charges.

2.   FEES AND EXPENSES

2.1  PERIODIC FEE. The Borrower agrees to pay a fee equal to one-eighth of one
percent (1/8%) per annum of the Commitment. This fee is due on March 31, 1996,
and on the last day of each following quarter until the expiration of the
availability period.

2.2  EXPENSES. The Borrower agrees to reimburse the Bank for any expenses it
incurs in the preparation of this Agreement and any agreement or instrument
required by this Agreement. Expenses include, but are not limited to, reasonable
attorneys' fees, including any allocated costs of the Bank's in-house counsel.

3.  DISBURSEMENTS, PAYMENTS AND COSTS

3.1  REQUESTS FOR CREDIT. Each request for an extension of credit will be made
in writing in a manner acceptable to the Bank, or by another means acceptable to
the Bank.

3.2  DISBURSEMENTS AND PAYMENTS. Each disbursement by the Bank and each payment
by the Borrower will be:

(a)  made at the Bank's branch (or other location) selected by the Bank from
     time to time;

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(b)  made for the account of the Bank's branch selected by the Bank from time to
     time;

(c)  made in immediately available funds, or such other type of funds selected
     by the Bank;

(d)  evidenced by records kept by the Bank. In addition, the Bank may, at its
     discretion, require the Borrower to sign one or more promissory notes.

3.3  TELEPHONE AUTHORIZATION.

(a)  The Bank may honor telephone instructions for advances or repayments or for
     the designation of optional interest rates given by any one of the
     individuals authorized to sign loan agreements on behalf of the Borrower,
     or any other individual designated by any one of such authorized signers.

(b)  Advances will be deposited in and repayments will be withdrawn from the
     Borrower's account number 14568-01494, or such other of the Borrower's
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     accounts with the Bank as designated in writing by the Borrower.

(c)  The Borrower indemnifies and excuses the Bank (including its officers,
     employees, and agents) from all liability, loss, and costs in connection
     with any act resulting from telephone instructions it reasonably believes
     are made by any individual authorized by the Borrower to give such
     instructions. This indemnity and excuse will survive this Agreement.

3.4  DIRECT DEBIT.

(a)  The Borrower agrees that interest and any fees will be deducted
     automatically on the due date from checking account number 14568-01494.
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(b)  The Bank will debit the account on the dates the payments become due. If a
     due date does not fall on a banking day, the Bank will debit the account on
     the first banking day following the due date.

(c)  The Borrower will maintain sufficient funds in the account on the dates the
     Bank enters debits authorized by this Agreement. If there are insufficient
     funds in the account on the date the Bank enters any debit authorized by
     this Agreement, the debit will be reversed.

3.5  BANKING DAYS. Unless otherwise provided in this Agreement, a banking day is
a day other than a Saturday or a Sunday on which the Bank is open for business
in California. For amounts bearing interest at an offshore rate (if any), a
banking day is a day other than a Saturday or a Sunday on which the Bank is
open for business in California and dealing in offshore dollars. All payments
and disbursements which would be due on a day which is not a banking day will be
due on the next banking day. All payments received on a day which is not a
banking day will be applied to the credit on the next banking day.

3.6  TAXES. The Borrower will not deduct any taxes from any payments it makes to
the Bank. If any government authority imposes any taxes on any payments made by
the Borrower, the Borrower will pay the taxes and will also pay to the Bank, at
the time interest is paid, any additional amount which the Bank specifies as
necessary to preserve the after-tax yield the Bank would have received if such
taxes had not been imposed. Upon request by the Bank, the Borrower will confirm
that it has paid the taxes by giving the Bank official tax receipts (or
notarized copies) within 30 days after the due date. However, the Borrower will
not pay the Bank's net income taxes.

3.7  ADDITIONAL COSTS. The Borrower will pay the Bank, on demand, for the Bank's
costs or losses arising from any statute or regulation, or any request or
requirement of a regulatory agency which is applicable to all national banks or
a class of all national banks. The costs and losses will be allocated to the
loan in a manner determined by the Bank, using any reasonable method. The costs
include the following:

(a)  any reserve or deposit requirements; and

(b)  any capital requirements relating to the Bank's assets and commitments for
     credit.

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3.8  INTEREST CALCULATION. Except as otherwise stated in this Agreement, all
interest and fees, if any, will be computed on the basis of a 360-day year and
the actual number of days elapsed. This results in more interest or a higher fee
than if a 365-day year is used.

3.9  INTEREST ON LATE PAYMENTS. At the Bank's sole option in each instance, any
amount not paid when due under this Agreement (including interest) shall bear
interest from the due date at the Bank's Reference Rate plus one (1.00)
percentage point. This may result in compounding of interest.

4.  CONDITIONS

The Bank must receive the following items, in form and content acceptable to the
Bank, before it is required to extend any credit to the Borrower under this
Agreement:

4.1  AUTHORIZATIONS. Evidence that the execution, delivery and performance by
the Borrower (and any guarantor) of this Agreement and any instrument or
agreement required under this Agreement have been duly authorized.

4.2  OTHER ITEMS. Any other items that the Bank reasonably requires.

5.   REPRESENTATIONS AND WARRANTIES

When the Borrower signs this Agreement, and until the Bank is repaid in full,
the Borrower makes the following representations and warranties. Each request
for an extension of credit constitutes a renewed representation.

5.1  ORGANIZATION OF BORROWER. The Borrower is a corporation duly formed and
existing under the laws of the state where organized.

5.2  AUTHORIZATION. This Agreement, and any instrument or agreement required
hereunder, are within the Borrower's powers, have been duly authorized, and do
not conflict with any of its organizational papers.

5.3  ENFORCEABLE AGREEMENT. This Agreement is a legal, valid and binding
agreement of the Borrower, enforceable against the Borrower in accordance with
its terms, and any instrument or agreement required hereunder, when executed and
delivered, will be similarly legal, valid, binding and enforceable.

5.4  GOOD STANDING. In each state in which the Borrower does business, it is
properly licensed, in good standing, and, where required, in compliance with
fictitious name statutes.

5.5  NO CONFLICTS. This Agreement does not conflict with any law, agreement, or
obligation by which the Borrower is bound.

5.6  FINANCIAL INFORMATION. All financial and other information that has been or
will be supplied to the Bank is:

(a)  sufficiently complete to give the Bank accurate knowledge of the Borrower's
     (and any guarantor's) financial condition.

(b)  in form and content required by the Bank.

(c)  in compliance with all government regulations that apply.

5.7  LAWSUITS. There is no lawsuit, tax claim or other dispute pending or
threatened against the Borrower, which, if lost, would impair the Borrower's
financial condition or ability to repay the loan, except as have been disclosed
in writing to the Bank.

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5.8  PERMITS, FRANCHISES. The Borrower possesses all permits, memberships,
franchises, contracts and licenses required and all trademark rights, trade name
rights, patent rights and fictitious name rights necessary to enable it to
conduct the business in which it is now engaged.

5.9  OTHER OBLIGATIONS.  The Borrower is not in default on any obligation for
borrowed money, any purchase money obligation or any other material lease,
commitment, contract, instrument or obligation.

5.10 INCOME TAX RETURNS. The Borrower has no knowledge of any pending
assessments or adjustments of its income tax for any year.

5.11 NO EVENT OF DEFAULT. There is no event which is, or with notice or lapse
of time or both would be, a default under this Agreement.

5.12 ERISA PLANS.

(a)  The Borrower has fulfilled its obligations, if any, under the minimum
     funding standards of ERISA and the Code with respect to each Plan and is in
     compliance in all material respects with the presently applicable
     provisions of ERISA and the Code, and has not incurred any liability with
     respect to any Plan under Title IV of ERISA.

(b)  No reportable event has occurred under Section 4043(b) of ERISA for which
     the PBGC requires 30 day notice.

(c)  No action by the Borrower to terminate or withdraw from any Plan has been
     taken and no notice of intent to terminate a Plan has been filed under
     Section 4041 of ERISA.

(d)  No proceeding has been commenced with respect to a Plan under Section 4042
     of ERISA, and no event has occurred or condition exists which might
     constitute grounds for the commencement of such a proceeding.

(e)  The following terms have the meanings indicated for purposes of this
     Agreement:

     (i)   "Code" means the Internal Revenue Code of 1986, as amended from time
           to time.

     (ii)  "ERISA" means the Employee Retirement Income Act of 1974, as amended
           from time to time.

     (iii) "PBGC" means the Pension Benefit Guaranty Corporation established
           pursuant to Subtitle A of Title IV of ERISA.

     (iv)  "Plan" means any employee pension benefit plan maintained or
           contributed to by the Borrower and insured by the Pension Benefit
           Guaranty Corporation under Title IV of ERISA.

5.13 LOCATION OF BORROWER. The Borrower's place of business (or, if the
Borrower has more than one place of business, its chief executive office) is
located at the address listed under the Borrower's signature on this Agreement.

6.  COVENANTS

The Borrower agrees, so long as credit is available under this Agreement and
until the Bank is repaid in full:

6.1  USE OF PROCEEDS. To use the proceeds of the credit only for short-term
working capital purposes, and at the option of the Bank, to finance drafts drawn
under any letter of credit issued under this Agreement.

6.2  FINANCIAL INFORMATION.  To provide the following financial information and
statements and such additional information as requested by the Bank from time to
time:

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(a)  Within 120 days of the Borrower's fiscal year end, the Borrower's annual
     financial statements. These financial statements must be audited by a
     Certified Public Accountant ("CPA") acceptable to the Bank.

(b)  Within 45 days of the period's end, the Borrower's quarterly financial
     statements for the first, second and third fiscal quarters, and within 9O
     days of the period's end, the Borrower's quarterly financial statements for
     the fourth fiscal quarter. The statements shall be prepared on a
     consolidated and consolidating basis and may be Borrower prepared.

(c)  Copies of the Borrower's Form 10-K Annual Report, Form 10-Q Quarterly
     Report and Form 8-K Current Report including any similar reports, within 10
     days after the date of filing with the Securities and Exchange Commission.

6.3  WORKING CAPITAL. To maintain current assets in excess of current
liabilities by at least Five Million Dollars ($5,000,000).

6.4  TANGIBLE NET WORTH.  To maintain tangible net worth equal to at least
Thirty Million Dollars ($30,000,000).

"Tangible net worth" means the gross book value of the Borrower's assets
(excluding goodwill, patents, trademarks, trade names, organization expense,
treasury stock, unamortized debt discount and expense, deferred research and
development costs, deferred marketing expenses, and other like intangibles, and
monies due from affiliates, officers, directors or shareholders of the Borrower)
less total liabilities, including but not limited to accrued and deferred income
taxes, and any reserves against assets.

6.5  TOTAL LIABILITIES TO TANGIBLE NET WORTH RATIO. To maintain a ratio of total
liabilities to tangible net worth not exceeding .65:1.0.

"Total liabilities" means the sum of current liabilities plus long term
liabilities.

6.6  PROFITABILITY. To maintain a positive net income before taxes and
extraordinary items for each six (6) month accounting period, measured
quarterly, using the trailing two (2) fiscal quarters.

6.7  OTHER DEBTS. Not to have outstanding or incur any contingent debts (other
than those to the Bank), or become liable for the debts of others in excess of
Five Million Dollars ($5,000,000) at any time without the Bank's written
consent. This does not prohibit:

(a)  Acquiring goods, supplies, or merchandise on normal trade credit.

(b)  Endorsing negotiable instruments received in the usual course of business.

(c)  Obtaining surety bonds in the usual course of business.

6.8   OTHER LIENS. Not to create, assume, or allow any security interest or lien
(including judicial liens) on property the Borrower now or later owns, except:

(a)  Deeds of trust and security agreements in favor of the Bank.

(b)  Liens for taxes not yet due.

(c)  Liens outstanding on the date of this Agreement disclosed in writing to the
     Bank.

(d)  Additional purchase money security interests in personal property acquired
     after the date of this Agreement so long as such liens encumber only assets
     acquired with proceeds from loans permitted thereunder.

6.9  OUT OF DEBT PERIOD. To repay any advances in full, and not to draw any
additional advances on its revolving line of credit, for a period of at least
thirty (30) consecutive days in each line-year. "Line-year" means

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the period between the date of this Agreement and January 31, 1997, and each
subsequent one-year period (if any). For the purposes of this paragraph,
"advances" does not include undrawn amounts of outstanding letters of credit.

6.10  NOTICES TO BANK. To promptly notify the Bank in writing of:

(a)  any lawsuit over Two Hundred Fifty Thousand Dollars ($250,000) against the
     Borrower.

(b)  any substantial dispute between the Borrower and any government authority.

(c)  any failure to comply with this Agreement.

(d)  any material adverse change in the Borrower's financial condition or
     operations.

(e)  any change in the Borrower's name, legal structure, place of business, or
     chief executive office if the Borrower has more than one place of business.

6.11  BOOKS AND RECORDS. To maintain adequate books and records.

6.12  AUDITS. To allow the Bank and its agents to inspect the Borrower's
properties and examine, audit and make copies of books and records at any
reasonable time. If any of the Borrower's properties, books or records are in
the possession of a third party, the Borrower authorizes that third party to
permit the Bank or its agents to have access to perform inspections or audits
and to respond to the Bank's requests for information concerning such
properties, books and records.

6.13  COMPLIANCE WITH LAWS. To comply with the laws (including any fictitious
name statute), regulations, and orders of any government body with authority
over the Borrower's business.

6.14  PRESERVATION OF RIGHTS. To maintain and preserve all rights, privileges,
and franchises the Borrower now has.

6.15  MAINTENANCE OF PROPERTIES. To make any repairs, renewals, or replacements
to keep the Borrower's properties in good working condition.

6.16  COOPERATION. To take any action requested by the Bank to carry out the
intent of this Agreement.

6.17  GENERAL BUSINESS INSURANCE. To maintain insurance as is usual for the
business it is in.

6.18  ADDITIONAL NEGATIVE COVENANTS. Not to, without the Bank's written consent:

(a)  engage in any business activities substantially different from the
     Borrower's present business.

(b)  liquidate or dissolve the Borrower's business.

(c)  enter into any consolidation, merger, pool, joint venture, syndicate, or
     other combination.

(d)  lease, or dispose of all or a substantial part of the Borrower's business
     or the Borrower's assets except in the ordinary course of the Borrower's
     business.

(e)  sell or otherwise dispose of any assets for less than fair market value, or
     enter into any sale and leaseback agreement covering any of its fixed or
     capital assets.

6.19  ERISA PLANS. To give prompt written notice to the Bank of:

(a)  The occurrence of any reportable event under Section 4043(b) of ERISA for
     which the PBGC requires 30 day notice.

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(b)  Any action by the Borrower to terminate or withdraw from a Plan or the
     filing of any notice of intent to terminate under Section 4041 of ERISA.

(c)  Any notice of noncompliance made with respect to a Plan under Section
     4041(b) of ERISA.

(d)  The commencement of any proceeding with respect to a Plan under Section
     4042 of ERISA.

7.  HAZARDOUS WASTE INDEMNIFICATION

The Borrower will indemnify and hold harmless the Bank from any loss or
liability directly or indirectly arising out of the use, generation,
manufacture, production, storage, release, threatened release, discharge,
disposal or presence of a hazardous substance. This indemnity will apply
whether the hazardous substance is on, under or about the Borrower's property or
operations or property leased to the borrower. The indemnity includes but is not
limited to attorneys' fees (including the reasonable estimate of the allocated
cost of in-house counsel and staff). The indemnity extends to the Bank, its
parent, subsidiaries and all of their directors, officers, employees, agents,
successors, attorneys and assigns. For these purposes, the term "hazardous
substances" means any substance which is or becomes designated as "hazardous" or
"toxic" under any federal, state or local law. This indemnity will survive
repayment of the Borrower's obligations to the Bank.

8.  DEFAULT

If any of the following events occur, the Bank may do one or more of the
following: declare the Borrower in default, stop making any additional credit
available to the Borrower, and require the Borrower to repay its entire debt
immediately and without prior notice. If an event of default occurs under the
paragraph entitled "Bankruptcy," below, with respect to the Borrower, then the
entire debt outstanding under this Agreement will automatically be due
immediately.

8.1  FAILURE TO PAY. The Borrower fails to make a payment under this Agreement
when due.

8.2  FALSE INFORMATION.  The Borrower has given the Bank false or misleading
information or representations.

8.3   BANKRUPTCY. The Borrower (or any guarantor) files a bankruptcy petition, a
bankruptcy petition is filed against the Borrower (or any guarantor) , or the
Borrower (or any guarantor) makes a general assignment for the benefit of
creditors.

8.4  RECEIVERS. A receiver or similar official is appointed for the Borrower's
(or any guarantor's) business, or the business is terminated.

8.5  GOVERNMENT ACTION. Any government authority takes action that the Bank
believes materially adversely affects the Borrower's (or any guarantor's)
financial condition or ability to repay.

8.6  MATERIAL ADVERSE CHANGE.  A material adverse change occurs in the
Borrower's (or any guarantor's) financial condition, properties or prospects, or
ability to repay the loan.

8.7  CROSS-DEFAULT.  Any default occurs under any agreement in connection with
any credit the Borrower has obtained from anyone else or which the Borrower has
guaranteed.

8.8  OTHER BANK AGREEMENTS. The Borrower fails to meet the conditions of, or
fails to perform any obligation under any other agreement the Borrower has with
the Bank or any affiliate of the Bank.

8.9  ERISA PLANS. The occurrence of any one or more of the following events with
respect to the Borrower, provided such event or events could reasonably be
expected, in the judgment of the Bank, to subject the Borrower to any tax,
penalty or liability (or any combination of the foregoing) which, in the

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aggregate, could have a material adverse effect on the financial condition of
the Borrower with respect to a Plan:

(a)  A reportable event shall occur with respect to a Plan which is, in the
     reasonable judgment of the Bank likely to result in the termination of such
     Plan for purposes of Title IV of ERISA.

(b)  Any Plan termination (or commencement of proceedings to terminate a Plan)
     or the Borrower's full or partial withdrawal from a Plan.

8.10  OTHER BREACH UNDER AGREEMENT.  The Borrower fails to meet the conditions
of, or fails to perform any obligation under, any term of this Agreement not
specifically referred to in this Article.

9.  ENFORCING THIS AGREEMENT; MISCELLANEOUS

9.1  GAAP. Except as otherwise stated in this Agreement, all financial
information provided to the Bank and all financial covenants will be made under
generally accepted accounting principles, consistently applied.

9.2  CALIFORNIA LAW. This Agreement is governed by California law.

9.3  SUCCESSORS AND ASSIGNS. This Agreement is binding on the Borrower's and the
Bank's successors and assignees. The Borrower agrees that it may not assign this
Agreement without the Bank's prior consent. The Bank may sell participations in
or assign this loan, and may exchange financial information about the Borrower
with actual or potential participants or assignees; provided that such actual or
potential participants or assignees shall agree to treat all financial
information exchanged as confidential. If a participation is sold or the loan is
assigned, the purchaser will have the right of set-off against the Borrower.

9.4  ARBITRATION.

(a)  This paragraph concerns the resolution of any controversies or claims
     between the Borrower and the Bank, including but not limited to those that
     arise from:

     (i)   This Agreement (including any renewals, extensions or modifications
           of this Agreement);

     (ii)  Any document, agreement or procedure related to or delivered in
           connection with this Agreement;
     
     (iii) Any violation of this Agreement; or

     (iv)  Any claims for damages resulting from any business conducted between
           the Borrower and the Bank, including claims for injury to persons,
           property or business interests (torts).

(b)  At the request of the Borrower or the Bank, any such controversies or
     claims will be settled by arbitration in accordance with the United States
     Arbitration Act. The United States Arbitration Act will apply even though
     this Agreement provides that it is governed by California law.

(c)  Arbitration proceedings will be administered by the American Arbitration
     Association and will be subject to its commercial rules of arbitration.

(d)  For purposes of the application of the statute of limitations, the filing
     of an arbitration pursuant to this paragraph is the equivalent of the
     filing of a lawsuit, and any claim or controversy which may be arbitrated
     under this paragraph is subject to any applicable statute of limitations.
     The arbitrators will have the authority to decide whether any such claim or
     controversy is barred by the statute of limitations and, if so, to dismiss
     the arbitration on that basis.

(e)  If there is a dispute as to whether an issue is arbitrable, the arbitrators
     will have the authority to resolve any such dispute.

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(f)  The decision that results from an arbitration proceeding may be submitted
     to any authorized court of law to be confirmed and enforced.

(g)  The procedure described above will not apply if the controversy or claim,
     at the time of the proposed submission to arbitration, arises from or
     relates to an obligation to the Bank secured by real property located in
     California. In this case, both the Borrower and the Bank must consent to
     submission of the claim or controversy to arbitration. If both parties do
     not consent to arbitration, the controversy or claim will be settled as
     follows:

     (i)   The Borrower and the Bank will designate a referee (or a panel of
           referees) selected under the auspices of the American Arbitration
           Association in the same manner as arbitrators are selected in
           Association-sponsored proceedings;

     (ii)  The designated referee (or the panel of referees) will be appointed
           by a court as provided in California Code of Civil Procedure Section
           638 and the following related sections;

     (iii) The referee (or the presiding referee of the panel) will be an
           active attorney or a retired judge; and

     (iv)  The award that results from the decision of the referee (or the
           panel) will be entered as a judgment in the court that appointed the
           referee, in accordance with the provisions of California Code of
           Civil Procedure Sections 644 and 645.

(h)  This provision does not limit the right of the Borrower or the Bank to:

     (i)   exercise self-help remedies such as setoff;

     (ii)  foreclose against or sell any real or personal property collateral;
           or

     (iii) act in a court of law, before, during or after the arbitration
           proceeding to obtain:

           (A)  an interim remedy; and/or
 
           (B)  additional or supplementary remedies.

(i)  The pursuit of or a successful action for interim, additional or
     supplementary remedies, or the filing of a court action, does not
     constitute a waiver of the right of the Borrower or the Bank, including the
     suing party, to submit the controversy or claim to arbitration if the other
     party contests the lawsuit. However, if the controversy or claim arises
     from or relates to an obligation to the Bank which is secured by real
     property located in California at the time of the proposed submission to
     arbitration, this right is limited according to the provision above
     requiring the consent of both the Borrower and the Bank to seek resolution
     through arbitration.

(j)  If the Bank forecloses against any real property securing this Agreement,
     the Bank has the option to exercise the power of sale under the deed of
     trust or mortgage, or to proceed by judicial foreclosure.

9.5  SEVERABILITY; WAIVERS. If any part of this Agreement is not enforceable,
the rest of the Agreement may be enforced. The Bank retains all rights, even if
it makes a loan after default. If the Bank waives a default, it may enforce a
later default. Any consent or waiver under this Agreement must be in writing.

9.6  ADMINISTRATION COSTS. The Borrower shall pay the Bank for all reasonable
costs incurred by the Bank in connection with administering this Agreement.

9.7  ATTORNEYS' FEES. The Borrower shall reimburse the Bank for any reasonable
costs and attorneys' fees incurred by the Bank in connection with the
enforcement or preservation of any rights or remedies under this Agreement and
any other documents executed in connection with this Agreement, and including
any amendment, waiver, "workout" or restructuring under this Agreement. In the
event of a lawsuit or arbitration

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proceeding, the prevailing party is entitled to recover costs and reasonable
attorneys' fees incurred in connection with the lawsuit or arbitration
proceeding, as determined by the court or arbitrator. As used in this paragraph,
"attorneys' fees" includes the allocated costs of in-house counsel.

9.8  ONE AGREEMENT. This Agreement and any related security or other agreements
required by this Agreement, collectively:

(a)  represent the sum of the understandings and agreements between the Bank and
     the Borrower concerning this credit; and

(b)  replace any prior oral or written agreements between the Bank and the
     Borrower concerning this credit; and

(c)  are intended by the Bank and the Borrower as the final, complete and
     exclusive statement of the terms agreed to by them.

In the event of any conflict between this Agreement and any other agreements
required by this Agreement, this Agreement will prevail.

9.9  NOTICES. All notices required under this Agreement shall be personally
delivered or sent by first class mail, postage prepaid, to the addresses on the
signature page of this Agreement, or to such other addresses as the Bank and the
Borrower may specify from time to time in writing.

9.10  HEADINGS. Article and paragraph headings are for reference only and shall
not affect the interpretation or meaning of any provisions of this Agreement.



This Agreement is executed as of the date stated at the top of the first page.



[LOGO]
Bank of America 
National Trust and Savings Association    UNIT INSTRUMENTS, INC.

X    /s/ P. Michael Roesner               X     /s/ Michael J. Doyle
- --------------------------------          --------------------------------
BY:     P. MICHAEL ROESNER                BY:     MICHAEL J. DOYLE
TITLE:  VICE PRESIDENT                    TITLE:  PRESIDENT AND       
                                                  CHIEF EXECUTIVE OFFICER 


ADDRESS WHERE NOTICES TO THE BANK         ADDRESS WHERE NOTICES TO THE 
ARE TO BE SENT:                           BORROWER ARE TO BE SENT:     
                                                                       
North Orange County RCBO #1456            22600 Savi Ranch Parkway     
300 South Harbor Blvd.                    Yorba Linda, California 92687 
Anaheim, California 92805






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