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公开(公告)号：US3200855A
公开(公告)日：1965-08-17
申请号：US10535161
申请日：1961-04-25
Applicant: TELEFUNKEN PATENT
Inventor： EHRHARD WENZEL , GUNTER MARQUARDT
IPC: H01J19/00
CPC classification number: H01J19/00 , H01J2893/0023 , H01J2893/0025
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