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公开(公告)号：US2517605A
公开(公告)日：1950-08-08
申请号：US61141445
申请日：1945-08-18
Applicant: INT STANDARD ELECTRIC CORP
Inventor： NORMAN SMYTH CHARLES , STEPHENS WADE ARCHIBALD
IPC: G01R23/04
CPC classification number: G01R23/04
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