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公开(公告)号：US2384742A
公开(公告)日：1945-09-11
申请号：US50758443
申请日：1943-10-25
Applicant: EBENEZER HEWITT NORMAN
Inventor： EBENEZER HEWITT NORMAN
CPC classification number: F16H19/00 , F16C1/00 , G05G7/02 , Y10T74/18992 , Y10T74/20456 , Y10T74/20528
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