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公开(公告)号：US3070718A
公开(公告)日：1962-12-25
申请号：US3860660
申请日：1960-06-24
Applicant: TELEFUNKEN GMBH
Inventor： GEORG MARX
IPC: H01J17/48
CPC classification number: H01J17/48 , H01J2893/007
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