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公开(公告)号：US2956337A
公开(公告)日：1960-10-18
申请号：US59284956
申请日：1956-06-21
Applicant: CEFILAC
Inventor： JEAN BUFFET , JOSEPH MERIAUX
CPC classification number: B21C23/32 , B21J5/10 , Y10T29/49812
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