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公开(公告)号：US2405018A
公开(公告)日：1946-07-30
申请号：US57843845
申请日：1945-02-17
Applicant: VICTOR METAL PRODUCTS CORP
Inventor： CHARLES CROWLEY
IPC: B21D51/36
CPC classification number: B21D51/36 , Y10T279/17231 , Y10T279/17367
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