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公开(公告)号：US2773570A
公开(公告)日：1956-12-11
申请号：US32330852
申请日：1952-11-29
Applicant: GEN ELECTRIC
Inventor： MIHRAN THEODORE G , SWARTZ THEODORE C
IPC: H01J5/26
CPC classification number: H01J5/26 , H01J2893/0041 , Y10T403/443 , Y10T403/47 , Y10T403/479
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