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公开(公告)号：US2589887A
公开(公告)日：1952-03-18
申请号：US76494747
申请日：1947-07-31
Applicant: ELSWORTH SPRAGUE GUY
Inventor： ELSWORTH SPRAGUE GUY
IPC: B65G17/38
CPC classification number: B65G17/38 , B65G2201/06
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