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公开(公告)号：US3187421A
公开(公告)日：1965-06-08
申请号：US13682861
申请日：1961-09-08
Applicant: INTERNAT COLD FORGING CORP
Inventor： HEINZ FELDMANN , GUILLEAUME SCHAMING
CPC classification number: B21K27/06 , B21K21/02 , Y10T29/49798 , Y10T29/5121
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