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公开(公告)号：US2152058A
公开(公告)日：1939-03-28
申请号：US17349837
申请日：1937-11-08
Applicant: KING EMORY L
Inventor： KING EMORY L
CPC classification number: B25B1/2489 , B25B1/103 , B25B1/125
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