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公开(公告)号：US1811014A
公开(公告)日：1931-06-23
申请号：US39003829
申请日：1929-09-03
Applicant: KERWIN LUCILLE A
Inventor： KERWIN LUCILLE A
IPC: B63C7/26
CPC classification number: B63C7/26 , B63B2201/02 , B63B2205/08
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