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公开(公告)号：US3304453A
公开(公告)日：1967-02-14
申请号：US41937564
申请日：1964-12-18
Applicant: TELEFUNKEN PATENT
Inventor： FRANZ DLOUHY
IPC: H01J19/28
CPC classification number: H01J19/28 , H01J2893/0013
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