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公开(公告)号：US1753700A
公开(公告)日：1930-04-08
申请号：US17003727
申请日：1927-02-21
Applicant: DURA CO
Inventor： GEORGE GRAFF , HASKINS HOWARD B , GUNTHER GEORGE E
IPC: G05G1/08
CPC classification number: G05G1/085 , Y10T74/20744 , Y10T292/82
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