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公开(公告)号：US2510212A
公开(公告)日：1950-06-06
申请号：US8001649
申请日：1949-03-07
Applicant: CHARLIE DONNELL
Inventor： CHARLIE DONNELL
IPC: B65G15/44
CPC classification number: B65G15/44 , B65G2201/04
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