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公开(公告)号：US3025155A
公开(公告)日：1962-03-13
申请号：US77562658
申请日：1958-11-21
Applicant: ALUMINUM CO OF AMERICA
Inventor： LEE MAURICE F , BRONDYKE KENNETH J , HESS PAUL D
IPC: C22B21/06
CPC classification number: C22B21/066
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