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公开(公告)号：US2249760A
公开(公告)日：1941-07-22
申请号：US24923439
申请日：1939-01-04
Applicant: BECKWITH MFG CO
Inventor： HARRISON RAYMOND B , ALLEY LYMAN E
IPC: A43D11/14
CPC classification number: A43D11/14
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