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公开(公告)号：US2693054A
公开(公告)日：1954-11-02
申请号：US28350752
申请日：1952-04-21
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： FRANK RECINIELLO
IPC: H01J5/24
CPC classification number: H01J5/24 , H01J2893/0039
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