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公开(公告)号：US3220891A
公开(公告)日：1965-11-30
申请号：US16469762
申请日：1962-01-08
Applicant: ALUMINUM CO OF AMERICA
Inventor： TEMPLETON REGINALD K , STEGEN EARL E
CPC classification number: C22F1/04 , C21D1/42 , Y02P10/253
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