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公开(公告)号：US2414605A
公开(公告)日：1947-01-21
申请号：US48675243
申请日：1943-05-13
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： OKRESS ERNEST C , NELSON DONALD E
IPC: H01J23/05
CPC classification number: H01J23/05
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