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公开(公告)号：US2136188A
公开(公告)日：1938-11-08
申请号：US7777236
申请日：1936-05-04
Applicant: SNAP ON TOOLS INC
Inventor： GAGNE GIDEON R , LON SPRAKER
IPC: B24B15/04
CPC classification number: B24B15/04
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