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公开(公告)号：US1028876A
公开(公告)日：1912-06-11
申请号：US1910595525
申请日：1910-12-03
Applicant: HARDGRAVE ROBERT GASTON , ADAIR CHARLES T
Inventor： HARDGRAVE ROBERT GASTON , ADAIR CHARLES T
CPC classification number: F16H2702/04
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