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公开(公告)号：US2316009A
公开(公告)日：1943-04-06
申请号：US40816441
申请日：1941-08-25
Applicant: GEN MOTORS CORP
Inventor： MARTIN EDWARD J , DIETZ ROBERT H
IPC: G01L7/00
CPC classification number: G01L7/00
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