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公开(公告)号：US3047760A
公开(公告)日：1962-07-31
申请号：US79914759
申请日：1959-03-13
Applicant: PHILIPS CORP
Inventor： JOHANNES HERMSEN , JOHANNES KRAAIJEVELD PIETER , NICOLAAS WARMOLTZ
IPC: H01J47/08
CPC classification number: H01J47/08
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