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公开(公告)号：US1778878A
公开(公告)日：1930-10-21
申请号：US30786328
申请日：1928-09-24
Applicant: MILTON WILSON
Inventor： MILTON WILSON
IPC: B65G15/42
CPC classification number: B65G15/42 , B65G2201/04
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