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公开(公告)号：US2314584A
公开(公告)日：1943-03-23
申请号：US35999340
申请日：1940-10-07
Applicant: KRITZ LEO L
Inventor： KRITZ LEO L
CPC classification number: G08B5/28 , G01N33/68 , Y10T74/11 , Y10T137/8175
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