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公开(公告)号：US2911364A
公开(公告)日：1959-11-03
申请号：US61388456
申请日：1956-10-04
Applicant: NORTH AND JUDD MFG COMPANY
Inventor： KRETZMER JR MINOR G , TOWNSEND ROBERT C
IPC: C02F9/00
CPC classification number: B63J4/006 , C02F1/50 , C02F2201/001 , Y10T137/2514
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