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公开(公告)号：US2137964A
公开(公告)日：1938-11-22
申请号：US14212137
申请日：1937-05-12
Applicant: FALK CORP
Inventor： KELLEY JAMES B , SCHMITTER WALTER P
IPC: F16D3/56
CPC classification number: F16D3/56
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