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公开(公告)号：US2711816A
公开(公告)日：1955-06-28
申请号：US29761152
申请日：1952-07-08
Applicant: F B WRIGHT COMPANY
Inventor： RENO WILLIAM H
IPC: B65G15/44
CPC classification number: B65G15/44 , B65G2201/04
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