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公开(公告)号：US2225292A
公开(公告)日：1940-12-17
申请号：US28816239
申请日：1939-08-03
Applicant: ALUMINUM CO OF AMERICA
Inventor： ANDREWS JR RAYNAL W , LARS IVERSON EINAR
IPC: B22D13/10
CPC classification number: B22D13/10 , Y10T29/53061 , Y10T29/53796 , Y10T29/5383
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