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公开(公告)号：US3449650A
公开(公告)日：1969-06-10
申请号：US3449650D
申请日：1967-12-29
Applicant: RCA CORP
Inventor： LYNN SEYMOUR , RIES WARREN CALVIN
CPC classification number: H01J19/28 , H01J2893/0013 , Y10T29/435
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