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公开(公告)号：US1230071A
公开(公告)日：1917-06-12
申请号：US2861415
申请日：1915-05-17
Applicant: EARL R KILPATRICK , HAWK LEWIS E
Inventor： HAWK LEWIS E
CPC classification number: G05D16/103 , Y10T137/3709 , Y10T137/7808 , Y10T137/7838 , Y10T137/8326 , Y10T137/87917
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