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公开(公告)号：US2033727A
公开(公告)日：1936-03-10
申请号：US63788232
申请日：1932-10-15
Applicant: BECKWITH MFG CO
Inventor： MILLER HAROLD S , GOODWIN HOLLIS E , LOVELL STANLEY P
IPC: A43B23/08
CPC classification number: A43B23/086 , Y10T442/198 , Y10T442/2361 , Y10T442/2746
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