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公开(公告)号：US3131085A
公开(公告)日：1964-04-28
申请号：US16715762
申请日：1962-01-18
Applicant: ALUMINUM CO OF AMERICA
Inventor： WELLS HENRY J , MCNAMARA JAMES H
IPC: C25D11/24
CPC classification number: C25D11/243
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