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公开(公告)号：US913121A
公开(公告)日：1909-02-23
申请号：US1907385877
申请日：1907-07-27
Applicant: COLUMBUS MACHINE COMPANY
Inventor： FRAYER LEE A
CPC classification number: F02D9/00 , Y10S261/53 , Y10T74/2151 , Y10T137/87692 , Y10T403/295
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