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公开(公告)号：US1970768A
公开(公告)日：1934-08-21
申请号：US57405031
申请日：1931-11-09
Applicant: GEN MOTORS CORP
Inventor： HECTOR RABEZZANA , DUFFENDACK ORA S
CPC classification number: C22C19/005 , C22C1/02 , C22C19/00
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