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公开(公告)号：US2454023A
公开(公告)日：1948-11-16
申请号：US58442345
申请日：1945-03-23
Applicant: ZIMMERMANN LEWIS C
Inventor： ZIMMERMANN LEWIS C
IPC: B65G17/38
CPC classification number: B65G17/38 , B65G2201/06
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