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1.发明授权Thermionic cathode with heat shield having a heating current by-pass 失效具有加热电流旁路的热风罩的THERMIONIC CATHODE
公开(公告)号：US3450927A
公开(公告)日：1969-06-17
申请号：US3450927D
申请日：1966-10-04
Applicant: PHILIPS CORP
Inventor： SCHMIDT WOLFGANG , SEIFERT HORST
CPC classification number: H01J17/06
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