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公开(公告)号：US1402766A
公开(公告)日：1922-01-10
申请号：US18295817
申请日：1917-07-26
Applicant: UNION CHAIN AND MFG COMPANY
Inventor： WALTER HAY
CPC classification number: B65G17/38 , B65G2201/04 , F16G13/07
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