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公开(公告)号：US2728443A
公开(公告)日：1955-12-27
申请号：US22094451
申请日：1951-04-13
Applicant: MAGNUSON ROY M
Inventor： PIKE JR CLINTON B , DAUGHERTY RALPH K
IPC: B65G47/14
CPC classification number: B65G47/1471
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