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公开(公告)号：US2860761A
公开(公告)日：1958-11-18
申请号：US67834057
申请日：1957-08-15
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： KOCAN STEPHEN J , WALZ JR RUDOLPH
IPC: H01J9/46
CPC classification number: H01J9/46 , H01J2893/0096 , H01J2893/0098 , Y10S198/955
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