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公开(公告)号：US2481591A
公开(公告)日：1949-09-13
申请号：US77236247
申请日：1947-09-05
Applicant: ALUMINUM CO OF AMERICA
Inventor： HEILMAN WILLIAM B , SHORT HERBERT M
IPC: C22B21/00
CPC classification number: C22B21/0069 , Y02P10/212
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