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公开(公告)号：US2623336A
公开(公告)日：1952-12-30
申请号：US5291248
申请日：1948-09-30
Applicant: GEN MOTORS CORP
Inventor： ONKSEN JR GEORGE W , STUART ARTHUR H , DOW JR GROVE S
IPC: B24B41/06
CPC classification number: B24B41/06
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