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公开(公告)号：US2831225A
公开(公告)日：1958-04-22
申请号：US46000654
申请日：1954-10-04
Applicant: GEN MOTORS CORP
Inventor： KOLBE ADELBERT E , PHILLIPS GEORGE J
IPC: B22C9/10
CPC classification number: B22C9/103
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