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公开(公告)号：US1124109A
公开(公告)日：1915-01-05
申请号：US1913747969
申请日：1913-02-12
Applicant: HARRY A SHEADS , CONOVER WILLIAM M
Inventor： CONOVER WILLIAM M
IPC: B62H1/04
CPC classification number: B62H1/04 , B62K2201/04
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