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公开(公告)号：US2594971A
公开(公告)日：1952-04-29
申请号：US58191945
申请日：1945-03-09
Applicant: GEN ELECTRIC
Inventor： BALLIOL MOULLIN ERIC
CPC classification number: H01J25/08 , G01R29/105 , H01J25/10 , H01Q17/00
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