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公开(公告)号：US3211996A
公开(公告)日：1965-10-12
申请号：US7387660
申请日：1960-12-05
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： FOX RUSSELL E , PHELPS ARTHUR V
CPC classification number: G01N27/622 , H01H2033/567
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