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公开(公告)号：US2619455A
公开(公告)日：1952-11-25
申请号：US18302450
申请日：1950-09-02
Applicant: ALUMINUM CO OF AMERICA
Inventor： HARRIS WESLEY W , WISER BROWN
IPC: C23F13/02
CPC classification number: C23F13/02
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