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公开(公告)号：US2930933A
公开(公告)日：1960-03-29
申请号：US72392658
申请日：1958-03-25
Applicant: GEN ELECTRIC
Inventor： GRIFFIN JR GERALD J , WATSON ROBERT P , CARMINE MIGLORE , HODGES DAVID J
IPC: H01J25/56
CPC classification number: H01J25/56
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