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公开(公告)号：US2438221A
公开(公告)日：1948-03-23
申请号：US45467242
申请日：1942-08-13
Applicant: CALLITE TUNGSTEN CORP
Inventor： JACOB KURTZ , ENRICO ZAMPIERI
IPC: C22C19/07
CPC classification number: C22C19/07
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