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公开(公告)号：US1660354A
公开(公告)日：1928-02-28
申请号：US53109322
申请日：1922-01-23
Applicant: PAUL PHELPS
Inventor： PAUL PHELPS
IPC: B65G17/38
CPC classification number: B65G17/38 , B65G2201/06
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