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公开(公告)号:US2743811A
公开(公告)日:1956-05-01
申请号:US33783353
申请日:1953-02-19
Applicant: COMPTOIR IND ETIRAGE
Inventor: JEAN DELCROIX
IPC: B21C33/00
CPC classification number: B21C33/00
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公开(公告)号:US2736429A
公开(公告)日:1956-02-28
申请号:US30806452
申请日:1952-09-05
Applicant: COMPTOIR IND ETIRAGE
Inventor: JACQUES SEJOURNET , JEAN DELCROIX
IPC: B21C26/00
CPC classification number: B21C26/00
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