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公开(公告)号：US3126937A
公开(公告)日：1964-03-31
申请号：US3126937D
申请日：1962-02-15
Applicant: GEN DYNAMICS CORP
Inventor： BROWER DAVID F , FORTESCU P
IPC: B21D26/14
CPC classification number: B21D26/14 , Y10S264/45 , Y10T29/49803
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