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公开(公告)号：US2411205A
公开(公告)日：1946-11-19
申请号：US45144442
申请日：1942-07-18
Applicant: RCA CORP
Inventor： GREEN NORVAL H , RUPP WILLIAM B
IPC: H01J21/14
CPC classification number: H01J21/14 , H01J2893/0029
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