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公开(公告)号：US2896122A
公开(公告)日：1959-07-21
申请号：US54765355
申请日：1955-11-18
Applicant: INT STANDARD ELECTRIC CORP
Inventor： MEIRION JACKSON THOMAS , FREDERIC SELL ERIC ANDREAS
CPC classification number: H01J17/30 , H01J17/44 , H01J2893/0068
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