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公开(公告)号：US2538244A
公开(公告)日：1951-01-16
申请号：US14755150
申请日：1950-03-03
Applicant: ALUMINUM CO OF AMERICA
Inventor： HILEMAN JAMES M
IPC: C22F1/04
CPC classification number: C22F1/04 , Y10S206/819
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