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公开(公告)号：US1678211A
公开(公告)日：1928-07-24
申请号：US74306524
申请日：1924-10-11
Applicant: FREDERICK DAVIDSON GEORGE
Inventor： FREDERICK DAVIDSON GEORGE
CPC classification number: B60C3/00 , B60C9/2006 , Y10T152/10207 , Y10T152/1027 , Y10T152/10774
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