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公开(公告)号：US1686421A
公开(公告)日：1928-10-02
申请号：US23113827
申请日：1927-11-04
Applicant: GALBRAITH RUSSELL ROBERT
Inventor： GALBRAITH RUSSELL ROBERT
CPC classification number: F02M1/005 , G05G7/14 , Y10T74/20468 , Y10T137/6884
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