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公开(公告)号：US2761573A
公开(公告)日：1956-09-04
申请号：US20075950
申请日：1950-12-14
Applicant: SCREW CONVEYOR CORP
Inventor： FULPER JOHN H
IPC: B65G67/00
CPC classification number: B65G67/00 , B65G2814/0389
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