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公开(公告)号：US2649214A
公开(公告)日：1953-08-18
申请号：US28033452
申请日：1952-04-03
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： KIRBY JOSEPH J , MCGOWAN MICHAEL E
IPC: H01J9/24
CPC classification number: H01J9/24 , Y10S198/954
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