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公开(公告)号：US1725467A
公开(公告)日：1929-08-20
申请号：US29594828
申请日：1928-07-28
Applicant: ALVEY MFG COMPANY
Inventor： MARBLE LOUIS C
IPC: B65G17/38
CPC classification number: B65G17/385 , B65G2201/02
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