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1.发明授权
公开(公告)号：US2657088A
公开(公告)日：1953-10-27
申请号：US1267448
申请日：1948-03-02
Applicant: GEORGES CLEMENT PAUL
Inventor： GEORGES CLEMENT PAUL
CPC classification number: B60P3/20 , B61D27/0081 , Y02T30/42
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