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公开(公告)号：US2552810A
公开(公告)日：1951-05-15
申请号：US2922648
申请日：1948-05-26
Applicant: ALUMINUM CO OF AMERICA
Inventor： O'NEILL CLAYTON A , HARRIS WESLEY W , MARIUS GUYOT
IPC: B22D19/00
CPC classification number: B22D19/00
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