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公开(公告)号：US2662345A
公开(公告)日：1953-12-15
申请号：US21239951
申请日：1951-02-23
Applicant: RCA CORP
Inventor： RUGGIERO JOHN V
IPC: H01J5/24
CPC classification number: H01J5/24 , H01J2893/0039 , Y10T24/44068 , Y10T24/44368 , Y10T279/17393
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