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公开(公告)号：US2774420A
公开(公告)日：1956-12-18
申请号：US47975755
申请日：1955-01-04
Applicant: INTERNAT MACGREGOR ORGANIZATIO
Inventor： CLAUDE LECOMTE
CPC classification number: B63B19/24 , B61D39/002 , B63B19/18
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