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公开(公告)号：US2493169A
公开(公告)日：1950-01-03
申请号：US774648
申请日：1948-02-12
Applicant: SPEICHER MARCUS E , SPEICHER CARL F
Inventor： SPEICHER MARCUS E , SPEICHER CARL F
IPC: B65G19/28
CPC classification number: B65G19/282
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