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公开(公告)号：US1362693A
公开(公告)日：1920-12-21
申请号：US36071920
申请日：1920-02-24
Applicant: CALISTUS GRADY RONAN
Inventor： CALISTUS GRADY RONAN
IPC: B63B45/00
CPC classification number: B63B45/00 , B63B45/02 , B63B2201/08
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