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公开(公告)号：US3385774A
公开(公告)日：1968-05-28
申请号：US35223064
申请日：1964-03-16
Applicant: ALUMINUM CO OF AMERICA
Inventor： THOMPSON WILLIAM A , POWERS JOHN H
CPC classification number: C25D11/04 , C25D11/005 , C25D17/18
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