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公开(公告)号：US3201216A
公开(公告)日：1965-08-17
申请号：US7690560
申请日：1960-12-19
Applicant: RCA CORP
Inventor： WALTER HANDMANN RICHARD
IPC: H01J19/46
CPC classification number: H01J19/46 , H01J2893/0007
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