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公开(公告)号：US3350905A
公开(公告)日：1967-11-07
申请号：US39448964
申请日：1964-09-04
Applicant: AGENCY IND SCIENCE TECHN
Inventor： TAKASHI OGURA , TERUMORI UEDA , KEIICHI YASUDA
IPC: B21C37/29 , B21D26/037 , B21D26/041 , B21D26/043 , B21D26/045
CPC classification number: B21D26/045 , B21C37/294 , B21D26/037 , B21D26/041 , B21D26/043
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