Exhibit 3.20

                                  MARLEW, INC.

                                      *****

                                     BY-LAWS

                                      *****

                                    ARTICLE I

                                     OFFICES

            Section 1. The registered office shall be located in the City of
Dallas, State of Texas.

            Section 2. The corporation may also have offices at such other
places both within and without the State of Texas as the board of directors may
from time to time determine or the business of the corporation may require.

                                   ARTICLE II

                         ANNUAL MEETINGS OF SHAREHOLDERS

            Section 1. All meetings of shareholders for the election of
directors shall be held in the City of Fort Wayne, State of Indiana, at such
place as may be fixed from time to time by the board of directors.

            Section 2. Annual meetings of shareholders, commencing with the year
1973, shall be held on the eleventh day of May if not a legal holiday, and if a
legal holiday, then on the next secular day following, at 10:00 A. M.,


at which they shall elect by a plurality vote a board of directors, and transact
such other business as may properly be brought before the meeting.

            Section 3. Written or printed notice of the annual meeting stating
the place, day and hour of the meeting shall be delivered not less than ten nor
more than fifty days before the date of the meeting, either personally or by
mail, by or at the direction of the president, the secretary, or the officer or
persons calling the meeting, to each shareholder of record entitled to vote at
such meeting.

                                   ARTICLE III

                        SPECIAL MEETINGS OF SHAREHOLDERS

            Section 1. Special meetings of shareholders for any purpose other
than the election of directors may be held at such time and place within or
without the State of Texas as shall be stated in the notice of the meeting or in
a duly executed waiver of notice thereof.

            Section 2. Special meetings of the shareholders, for any purpose or
purposes, unless otherwise prescribed by statute or by the articles of
incorporation, may be called by the president, the board of directors, or the
holders of not less than one-tenth of all the shares entitled to vote at the
meeting.

            Section 3. Written or printed notice of a special meeting stating
the place, day and hour of the meeting and


the purpose or purposes for which the meeting is called, shall be delivered not
less than ten nor more than fifty days before the date of the meeting, either
personally or by mail, by or at the direction of the president, the secretary,
or the officer or persons calling the meeting, to each shareholder of record
entitled to vote at such meeting.

            Section 4. The business transacted at any special meeting of
shareholders shall be limited to the purposes stated in the notice.

                                   ARTICLE IV

                           QUORUM AND VOTING OF STOCK

            Section 1. The holders of a majority of the shares of stock issued
and outstanding and entitled to vote, represented in person or by proxy, shall
constitute a quorum at all meetings of the shareholders for the transaction of
business except as otherwise provided by statute or by the articles of
incorporation. If, however, such quorum shall not be present or represented at
any meeting of the shareholders, the shareholders present in person or
represented by proxy shall have power to adjourn the meeting from time to time,
without notice other than announcement at the meeting, until a quorum shall be
present or represented. At such adjourned meeting at which a quorum shall be
present or represented any business may be transacted which might have been
transacted at the meeting as originally notified.


            Section 2. If a quorum is present, the affirmative vote of a
majority of the shares of stock represented at the meeting shall be the act of
the shareholders unless the vote of a greater number of shares of stock is
required by law or the articles of incorporation.

            Section 3. Each outstanding share of stock, having voting power,
shall be entitled to one vote on each matter submitted to a vote at a meeting of
shareholders. A shareholder may vote either in person or by proxy executed in
writing by the shareholder or by his duly authorized attorney-in-fact.

            In all elections for directors every shareholder, entitled to vote,
shall have the right to vote, in person or by proxy, the number of shares of
stock owned by him, for as many persons as there are directors to be elected, or
to cumulate the vote of said shares, and give one candidate as many votes as the
number of directors multiplied by the number of his shares of stock shall equal,
or to distribute the votes on the same principle among as many candidates as he
may see fit.

            Section 4. Any action required to be taken at a meeting of the
shareholders may be taken without a meeting if a consent in writing, setting
forth the action so taken, shall be signed by all of the shareholders entitled
to vote with respect to the subject matter thereof.


                                    ARTICLE V

                                    DIRECTORS

            Section 1. The number of directors shall be three. Directors need
not be residents of the State of Texas nor shareholders of the corporation. The
directors, other than the first board of directors, shall be elected at the
annual meeting of the shareholders, and each director elected shall serve until
the next succeeding annual meeting and until his successor shall have been
elected and qualified. The first board of directors shall hold office until the
first annual meeting of shareholders.

            Section 2. Any vacancy occurring in the board of directors may be
filled by the affirmative vote of a majority of the remaining directors though
less than a quorum of the board of directors. A director elected to fill a
vacancy shall be elected for the unexpired portion of the term of his
predecessor in office.

            Any directorship to be filled by reason of an increase in the number
of directors shall be filled by election at an annual meeting or at a special
meeting of shareholders called for that purpose. A director elected to fill a
newly created directorship shall serve until the next succeeding annual meeting
of shareholders and until his successor shall have been elected and qualified.

            Section 3. The business affairs of the corporation shall be managed
by its board of directors which may exercise


all such powers of the corporation and do all such lawful acts and things as are
not by statute or by the articles of incorporation or by these by-laws directed
or required to be exercised or done by the shareholders.

            Section 4. The directors may keep the books of the corporation,
except such as are required by law to be kept within the state, outside of the
State of Texas, at such place or places as they may from time to time determine.

            Section 5. The board of directors, by the affirmative vote of a
majority of the directors then in office, and irrespective of any personal
interest of any of its members, shall have authority to establish reasonable
compensation of all directors for services to the corporation as directors,
officers or otherwise.

                                   ARTICLE VI

                       MEETINGS OF THE BOARD OF DIRECTORS

            Section 1. Meetings of the board of directors, regular or special,
may be held either within or without the State of Texas.

            Section 2. The first meeting of each newly elected board of
directors shall be held at such time and place as shall be fixed by the vote of
the shareholders at the annual meeting and no notice of such meeting shall be
necessary to the newly elected directors in order legally to constitute the
meeting, provided a quorum shall be present, or it may convene at such place and
time as shall be fixed by the con-


sent in writing of all the directors.

            Section 3. Regular meetings of the board of directors may be held
upon such notice, or without notice, and at such time and at such place as shall
from time to time be determined by the board.

            Section 4. Special meetings of the board of directors may be called
by the president on ten days' notice to each director, either personally or by
mail or by telegram; special meetings shall be called by the president or
secretary in like manner and on like notice on the written request of two
directors.

            Section 5. Attendance of a director at any meeting shall constitute
a waiver of notice of such meeting, except where a director attends for the
express purpose of objecting to the transaction of any business because the
meeting is not lawfully called or convened. Neither the business to be
transacted at, nor the purpose of, any regular or special meeting of the board
of directors need be specified in the notice or waiver of notice of such
meeting.

            Section 6. A majority of the directors shall constitute a quorum for
the transaction of business unless a greater number is required by law or by the
articles of incorporation. The act of a majority of the directors present at
any meeting at which a quorum is present shall be the act of the board of
directors, unless the act of a greater number is required by statute or by the
articles of incorporation.


If a quorum shall not be present at any meeting of directors, the directors
present thereat may adjourn the meeting from time to time, without notice other
than announcement at the meeting, until a quorum shall be present.

                                   ARTICLE VII

                               EXECUTIVE COMMITTEE

            Section 1. The board of directors, by resolution adopted by a
majority of the number of directors fixed by the by-laws or otherwise, may
designate two or more directors to constitute an executive committee, which
committee, to the extent provided in such resolution, shall have and exercise
all of the authority of the board of directors in the management of the
corporation, except as otherwise required by law. Vacancies in the membership of
the committee shall be filled by the board of directors at a regular or special
meeting of the board of directors. The executive committee shall keep regular
minutes of its proceedings and report the same to the board when required.

                                  ARTICLE VIII

                                     NOTICES

            Section 1. Whenever, under the provisions of the statutes or of the
articles of incorporation or of these by-laws, notice is required to be given to
any director or shareholder, it shall not be construed to mean personal notice,
but such notice may be given in writing, by mail, addressed to such director or
shareholder, at his address as


it appears on the records of the corporation, with postage thereon prepaid, and
such notice shall be deemed to be given at the time when the same shall be
deposited in the United States mail. Notice to directors may also be given by
telegram.

            Section 2. Whenever any notice whatever is required to be given
under the provisions of the statutes or under the provisions of the articles of
incorporation or these by-laws, a waiver thereof in writing signed by the person
or persons entitled to such notice, whether before or after the time stated
therein, shall be deemed equivalent to the giving of such notice.

                                   ARTICLE IX

                                    OFFICERS

            Section 1. The officers of the corporation shall be chosen by the
board of directors and shall be a president, a vice-president, a secretary and a
treasurer. The board of directors may also choose additional vice-presidents,
and one or more assistant secretaries and assistant treasurers.

            Section 2. The board of directors at its first meeting after each
annual meeting of shareholders shall choose a president, one or more
vice-presidents, a secretary and a treasurer, none of whom need be a member of
the board.

            Section 3. The board of directors may appoint such other officers
and agents as it shall deem necessary who shall hold their offices for such
terms and shall exercise such


powers and perform such duties as shall be determined from time to time by the
board of directors.

            Section 4. The salaries of all officers and agents of the
corporation shall be fixed by the board of directors.

            Section 5. The officers of the corporation shall hold office until
their successors are chosen and qualify. Any officer elected or appointed by the
board of directors may be removed at any time by the affirmative vote of a
majority of the board of directors. Any vacancy occurring in any office of the
corporation shall be filled by the board of directors.

                                  THE PRESIDENT

            Section 6. The president shall be the chief executive officer of the
corporation, shall preside at all meetings of the shareholders and the board of
directors, shall have general and active management of the business of the
corporation and shall see that all orders and resolutions of the board of
directors are carried into effect.

            Section 7. He shall execute bonds, mortgages and other contracts
requiring a seal, under the seal of the corporation, except where required or
permitted by law to be otherwise signed and executed and except where the
signing and execution thereof shall be expressly delegated by the board of
directors to some other officer or agent of the corporation.


                               THE VICE-PRESIDENTS

            Section 8. The vice-president, or if there shall be more than one,
the vice-presidents in the order determined by the board of directors, shall, in
the absence or disability of the president, perform the duties and exercise the
powers of the president and shall perform such other duties and have such other
powers as the board of directors may from time to time prescribe.

                     THE SECRETARY AND ASSISTANT SECRETARIES

            Section 9. The secretary shall attend all meetings of the board of
directors and all meetings of the shareholders and record all the proceedings of
the meetings of the corporation and of the board of directors in a book to be
kept for that purpose and shall perform like duties for the standing committees
when required. He shall give, or cause to be given, notice of all meetings of
the shareholders and special meetings of the board of directors, and shall
perform such other duties as may be prescribed by the board of directors or
president, under whose supervision he shall be. He shall have custody of the
corporate seal of the corporation and he, or an assistant secretary, shall have
authority to affix the same to any instrument requiring it and when so affixed,
it may be attested by his signature or by the signature of such assistant
secretary. The board of directors may give general authority to any other
officer to affix the seal of the corpo-


ration and to attest the affixing by his signature.

            Section 10. The assistant secretary, or if there be more than one,
the assistant secretaries in the order determined by the board of directors,
shall, in the absence or disability of the secretary, perform the duties and
exercise the powers of the secretary and shall perform such other duties and
have such other powers as the board of directors may from time to time
prescribe.

                     THE TREASURER AND ASSISTANT TREASURERS

            Section 11. The treasurer shall have the custody of the corporate
funds and securities and shall keep full and accurate accounts of receipts and
disbursements in books belonging to the corporation and shall deposit all moneys
and other valuable effects in the name and to the credit of the corporation in
such depositories as may be designated by the board of directors.

            Section 12. He shall disburse the funds of the corporation as may be
ordered by the board of directors, taking proper vouchers for such
disbursements, and shall render to the president and the board of directors, at
its regular meetings, or when the board of directors so requires, an account of
all his transactions as treasurer and of the financial condition of the
corporation.

            Section 13. If required by the board of directors, he shall give the
corporation a bond in such sum and with


such surety or sureties as shall be satisfactory to the board of directors for
the faithful performance of the duties of his office and for the restoration to
the corporation, in case of his death, resignation, retirement or removal from
office, of all books, papers, vouchers, money and other property of whatever
kind in his possession or under his control belonging to the corporation.

            Section 14. The assistant treasurer, or, if there shall be more than
one, the assistant treasurers in the order determined by the board of directors,
shall, in the absence or disability of the treasurer, perform the duties and
exercise the powers of the treasurer and shall perform such other duties and
have such other powers as the board of directors may from time to time
prescribe.

                                    ARTICLE X

                             CERTIFICATES FOR SHARES

            Section 1. The shares of the corporation shall be represented by
certificates signed by the president or a vice-president and the secretary or an
assistant secretary of the corporation, and may be sealed with the seal of the
corporation or a facsimile thereof.

            When the corporation is authorized to issue shares of more than one
class, every certificate shall set forth upon the face or back of such
certificate a statement of the designations, preferences, limitations and
relative rights of


the shares of each class authorized to be issued, as required by the laws of the
State of Texas.

            Section 2. The signatures of the officers of the corporation upon a
certificate may be facsimiles if the certificate is countersigned by a transfer
agent, or registered by a registrar, other than the corporation itself or an
employee of the corporation. In case any officer who has signed or whose
facsimile signature has been placed upon such certificate shall have ceased to
be such officer before such certificate is issued, it may be issued by the
corporation with the same effect as if he were such officer at the date of its
issue.

                                LOST CERTIFICATES

            Section 3. The board of directors may direct a new certificate to be
issued in place of any certificate theretofore issued by the corporation alleged
to have been lost or destroyed. When authorizing such issue of a new
certificate, the board of directors, in its discretion and as a condition
precedent to the issuance thereof, may prescribe such terms and conditions as it
deems expedient, and may require such indemnities as it deems adequate, to
protect the corporation from any claim that may be made against it with respect
to any such certificate alleged to have been lost or destroyed.


                               TRANSFERS OF SHARES

            Section 4. Upon surrender to the corporation or the transfer agent
of the corporation of a certificate representing shares duly endorsed or
accompanied by proper evidence of succession, assignment or authority to
transfer, a new certificate shall be issued to the person entitled thereto, and
the old certificate cancelled and the transaction recorded upon the books of the
corporation.

                            CLOSING OF TRANSFER BOOKS

            Section 5. For the purpose of determining shareholders entitled to
notice of or to vote at any meeting of shareholders, or any adjournment thereof
or entitled to receive payment of any dividend, or in order to make a
determination of shareholders for any other proper purpose, the board of
directors may provide that the stock transfer books shall be closed for a stated
period but not to exceed, in any case, fifty days. If the stock transfer books
shall be closed for the purpose of determining shareholders entitled to notice
of or to vote at a meeting of shareholders, such books shall be closed for at
least ten days immediately preceding such meeting. In lieu of closing the stock
transfer books, the board of directors may fix in advance a date as the record
date for any such determination of shareholders, such date in any case to be not
more than fifty days and, in case of a meeting of shareholders, not less than
ten days prior to the date on which the particular action, requiring such
determina-


tion of shareholders, is to be taken. If the stock transfer books are not closed
and no record date is fixed for the determination of shareholders entitled to
notice of or to vote at a meeting of shareholders, or shareholders entitled to
receive payment of a dividend, the date on which notice of the meeting is mailed
or the date on which the resolution of the board of directors declaring such
dividend is adopted, as the case may be, shall be the record date for such
determination of shareholders. When a determination of shareholders entitled to
vote at any meeting of shareholders has been made as provided in this section,
such determination shall apply to any adjournment thereof.

                             REGISTERED SHAREHOLDERS

            Section 6. The corporation shall be entitled to recognize the
exclusive right of a person registered on its books as the owner of shares to
receive dividends, and to vote as such owner, and to hold liable for calls and
assessments a person registered on its books as the owner of shares, and shall
not be bound to recognize any equitable or other claim to or interest in such
share or shares on the part of any other person, whether or not it shall have
express or other notice thereof, except as otherwise provided by the laws of
Texas.


                              LIST OF SHAREHOLDERS

            Section 7. The officer or agent having charge of the transfer books
for shares shall make, at least ten days before each meeting of shareholders, a
complete list of the shareholders entitled to vote at such meeting, arranged in
alphabetical order, with the address of each and the number of shares held by
each, which list, for a period of ten days prior to such meeting, shall be kept
on file at the registered office of the corporation and shall be subject to
inspection by any shareholder at any time during usual business hours. Such list
shall also be produced and kept open at the time and place of the meeting and
shall be subject to the inspection of any shareholder during the whole time of
the meeting. The original share ledger or transfer book, or a duplicate thereof,
shall be prima facie evidence as to who are the shareholders entitled to examine
such list or share ledger or transfer book or to vote at any meeting of the
shareholders.

                                   ARTICLE XI

                               GENERAL PROVISIONS

                                    DIVIDENDS

            Section 1. Subject to the provisions of the articles of
incorporation relating thereto, if any, dividends may be declared by the board
of directors at any regular or special meeting, pursuant to law. Dividends may
be paid in cash, in property or in shares of the capital


stock, subject to any provisions of the Articles of Incorporation.

            Section 2. Before payment of any dividend, there may be set aside
out of any funds of the corporation available for dividends such sum or sums as
the Directors from time to time, in their absolute discretion, think proper as a
reserve fund to meet contingencies, or for equalizing dividends, or for
repairing or maintaining any property of the corporation, or for such other
purpose as the Directors shall think conducive to the interest of the
corporation, and the Directors may modify or abolish any such reserve in the
manner in which it was created.

                                     CHECKS

            Section 3. All checks or demands for money and notes of the
corporation shall be signed by such officer or officer or such other person or
persons as the Board of Directors may from time to time designate.

                                   FISCAL YEAR

            Section 4. The fiscal year of the corporation shall be fixed by
resolution of the Board of Directors.

                                      SEAL

            Section 5. The corporate seal shall have inscribed thereon the name
of the corporation and the words "corporate seal" in the center of the circular
disc. The


seal may be used by causing it or a facsimile thereof to be impressed or affixed
or in any manner reproduced.

                                   ARTICLE XII

                                   AMENDMENTS

            Section 1. These by-laws may be altered, amended or repealed or new
by-laws may be adopted at any regular or special meeting of shareholders at
which a quorum is present or represented, by the affirmative vote of a majority
of the stock entitled to vote, provided notice of the proposed alteration,
amendment or repeal be contained in the notice of such meeting.

            The power to repeal, amend the by-laws, and adopt new by-laws may be
delegated to the board of directors by a similar vote at any such meeting. The
power, when delegated, may be revoked by a similar vote at any meeting of the
shareholders.