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公开(公告)号：US1732170A
公开(公告)日：1929-10-15
申请号：US24115827
申请日：1927-12-19
Applicant: LOUIS SAUNDERS HERBERT
Inventor： LOUIS SAUNDERS HERBERT
IPC: B63C7/30
CPC classification number: B63C7/30 , B63B2201/02 , B63B2201/12
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