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公开(公告)号：US3248784A
公开(公告)日：1966-05-03
申请号：US39712264
申请日：1964-09-17
Applicant: PHILIPS CORP
Inventor： JACOBUS VOORDOUW
CPC classification number: H01J19/00 , H01J9/46 , H01J19/46 , H01J2893/0006 , H01J2893/0026 , Y10T29/53261 , Y10T29/53548
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