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公开(公告)号：US3378723A
公开(公告)日：1968-04-16
申请号：US33513964
申请日：1964-01-02
Applicant: RCA CORP
Inventor： NAPOLI LOUIS S , SWARTZ GEORGE A
IPC: H01J25/00
CPC classification number: H01J25/005
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