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公开(公告)号：US3332773A
公开(公告)日：1967-07-25
申请号：US45533665
申请日：1965-05-12
Applicant: ALUMINUM CO OF AMERICA
Inventor： DUDAS JOSEPH H , COLLINS FRED R
CPC classification number: C22C21/10 , B23K35/286 , Y10T428/12764
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