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公开(公告)号：US2634698A
公开(公告)日：1953-04-14
申请号：US1095848
申请日：1948-02-26
Applicant: BECKERBAT AB
Inventor： ADOLF BECKER HARRY
IPC: B63B1/20
CPC classification number: B63B1/20 , B63B1/18 , B63B2001/201 , B63B2001/202
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