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公开(公告)号：US3192752A
公开(公告)日：1965-07-06
申请号：US29114563
申请日：1963-06-27
Applicant: ALUMINUM CO OF AMERICA
Inventor： DOWD JAMES D , PERRIER ALBERT A
CPC classification number: B21B45/0251 , B21B1/28 , B21B27/10 , B21B45/0284 , B21B2003/001 , Y10S428/924 , Y10T428/12639 , Y10T428/12736
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