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公开(公告)号：US2799796A
公开(公告)日：1957-07-16
申请号：US55701056
申请日：1956-01-03
Applicant: RCA CORP
Inventor： VERMETTE ALBERT P , MYERS LOWELL E
IPC: H01J19/28
CPC classification number: H01J19/28 , H01J2893/0013
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