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公开(公告)号：US2185557A
公开(公告)日：1940-01-02
申请号：US23083638
申请日：1938-09-20
Applicant: KOSER LEON W
Inventor： KOSER LEON W
IPC: B65G17/36
CPC classification number: B65G17/36 , B65G2201/04
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