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公开(公告)号：US3237657A
公开(公告)日：1966-03-01
申请号：US25968563
申请日：1963-02-19
Applicant: PHILIPS CORP
Inventor： GUNTER ELVERS ERNST , KURT HIRSCH , CHRISTOPH ZYWIETZ
IPC: H01J19/00
CPC classification number: H01J19/00 , H01J2893/0026
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