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公开(公告)号：US1886329A
公开(公告)日：1932-11-01
申请号：US16082427
申请日：1927-01-13
Applicant: BECKWITH MFG CO
Inventor： DALY JOHN J
IPC: A43B23/08
CPC classification number: A43B23/086 , Y10T442/2361
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