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公开(公告)号：US3366823A
公开(公告)日：1968-01-30
申请号：US53430866
申请日：1966-03-15
Applicant: PHILIPS CORP
Inventor： DORGELO EDUARD G , FINN JOHN E
CPC classification number: H01J21/18 , H01J19/34 , H01J2893/0003
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