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公开(公告)号：US2190905A
公开(公告)日：1940-02-20
申请号：US12495137
申请日：1937-02-10
Applicant: ORIN WELCH
Inventor： ORIN WELCH
CPC classification number: B60C5/00 , B60C3/02 , B60C5/04 , B60C19/00 , Y10T152/10819
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