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公开(公告)号：US2034823A
公开(公告)日：1936-03-24
申请号：US44519030
申请日：1930-04-17
Applicant: PHILIPS GLOCILAMPENFABRIEKEN N
Inventor： WILHELM MULDER JOHANNES GIJSBE
CPC classification number: H01J17/52 , H01J1/42 , H01J2893/0054
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