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公开(公告)号：US3119945A
公开(公告)日：1964-01-28
申请号：US77821958
申请日：1958-12-04
Applicant: PHILIPS CORP
Inventor： TOL HENDRIKUS JOHANNES MARIE V , PETRUS ALMA GERRIT HENDRIK , WILHELMUS LOEFFEN LUCAS , PETER KLOPPING CAREL
IPC: H01J19/40
CPC classification number: H01J19/40
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