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公开(公告)号：US927793A
公开(公告)日：1909-07-13
申请号：US1908418358
申请日：1908-02-28
Applicant: OSCAR P HANSON , HARTMAN HARVEY M
Inventor： HARTMAN HARVEY M
CPC classification number: B60C15/028 , Y10T152/10747
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