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                                                                 EXHIBIT 3.1

                          CERTIFICATE OF INCORPORATION
                                       OF
                             AETNA INDUSTRIES, INC.


          The undersigned incorporator, for the purpose of incorporating or
organizing a corporation under the General Corporation Law of the State of
Delaware, certifies:

          FIRST:   The name of the corporation is:  Aetna Industries, Inc.

          SECOND:  The address of the Corporation's registered office in the
State of Delaware is Corporation Trust Center, 1209 Orange Street in the City of
Wilmington, County of New Castle, 19801.  The name of its registered agent at
such address in The Corporation Trust Company.

          THIRD:   The purpose of the Corporation is to engage in any lawful act
or activity for which corporations may be organized under the General
Corporation Law of the State of Delaware.

          FOURTH:  The total number of shares of capital stock which the
Corporation shall have authority to issue is Three Thousand (3,000) shares, all
of such shares will be Common Stock, par value $.01 per share.

          FIFTH:   The name and mailing address of the incorporator is Sonia
Lopez, Morgan, Lewis & Bockius LLP, 101 Park Avenue, New York, New York 10178.

          SIXTH:   Elections of directors need not be by ballot unless the
By-Laws of the Corporation shall so provide.

          SEVENTH: The Board of Directors of the Corporation may make By-Laws
and from time to time may alter, amend or repeal By-Laws.

          EIGHTH:  No director of the Corporation shall be liable to the
Corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director, except for liability (i) for any breach of the director's
duty of loyalty to the Corporation or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law, (iii) under Section 174 of the Delaware General Corporation
Law, or (iv) for any transaction from which the director derived an improper
personal benefit.

          NINTH:   Whenever a compromise or arrangement is proposed between this
Corporation and its creditors or any class of them and/or between this
Corporation and its stockholders or any class of them, any court of equitable
jurisdiction within the State of Delaware may, on the application in a summary
way of this Corporation or of any creditor or stockholder thereof or on the
application of any receiver or receivers appointed for this Corporation under
the 

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provisions of Section 291 of Title 8 of the Delaware Code or on the application
of trustees in dissolution or of any receiver or receivers appointed to this
Corporation under the provisions of Section 279 of Title 8 of the Delaware Code
order a meeting of the creditors or class of creditors, and/or of the
stockholders or class of stockholders for this Corporation, as the case may be,
to be summoned in such manner as the said court directs.  If a majority in
number representing three-fourths in value of the creditors or class of
creditors, and/or of the stockholders or class of stockholders of this
Corporation, as the case may be, agree to any compromise or arrangement and to
any reorganization of this Corporation as consequence of such compromise or
arrangement, the said compromise or arrangement and the said reorganization
shall, if sanctioned by the court to which the said application has been made,
be binding on all the creditors or class of creditors, and/on all the
stockholders or class of stockholders, of this Corporation, as the case may be,
and also on this Corporation.



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          IN WITNESS WHEREOF, I have signed this Certificate this on July 24,
1996.




                                                /s/ Sonia Lopez
                                            -------------------------
                                                   Sonia Lopez