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公开(公告)号：US2858471A
公开(公告)日：1958-10-28
申请号：US49850255
申请日：1955-04-01
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： WALLACE GILLIES , HORNER CLIFFORD E
IPC: H01J19/28
CPC classification number: H01J19/28 , H01J2893/0013
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