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公开(公告)号:US3408130A
公开(公告)日:1968-10-29
申请号:US60746767
申请日:1967-01-05
Applicant: PHILIPS CORP
Inventor: BERNARDUS FRANSEN JAN JOSEPHUS , GERARDUS GILSING CHRISTIANUS P
IPC: H01J7/18 , H01J29/94
CPC classification number: H01J29/94 , H01J7/18