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公开(公告)号：US2110931A
公开(公告)日：1938-03-15
申请号：US4625235
申请日：1935-10-23
Applicant: EATON MFG CO
Inventor： DYER HAROLD I , HEDLUND OSCAR J W
IPC: B24B15/04
CPC classification number: B24B15/04 , Y10T82/2516
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