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公开(公告)号：US2151937A
公开(公告)日：1939-03-28
申请号：US10589336
申请日：1936-10-16
Applicant: INT STANDARD ELECTRIC CORP
Inventor： GUY RABUTEAU , PAUL CHEVIGNY GEORGES
IPC: H01J5/30
CPC classification number: H01J5/30 , H01J2893/0046 , Y10T403/47
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