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公开(公告)号：US2292463A
公开(公告)日：1942-08-11
申请号：US29709839
申请日：1939-09-29
Applicant: MILL WILLIAM M
Inventor： MILL WILLIAM M
IPC: B65G17/06
CPC classification number: B65G17/063 , B65G2201/06 , Y10T24/44641
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