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公开(公告)号：US2977843A
公开(公告)日：1961-04-04
申请号：US76969258
申请日：1958-10-27
Applicant: GEN MOTORS CORP
Inventor： GRAEBER RICHARD N , WANTTAJA GLENN E
CPC classification number: G01M11/061 , B60Q1/06
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