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公开(公告)号：US3340933A
公开(公告)日：1967-09-12
申请号：US52467866
申请日：1966-02-03
Applicant: MCGRAW BROS INC
Inventor： MCGRAW LEO F , CLARENCE MCGRAW
IPC: A01L1/02
CPC classification number: A01L1/02
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