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公开(公告)号：KR100006899B1
公开(公告)日：1979-09-12
申请号：KR1019740002773
申请日：1974-06-14
Applicant: 엔.브이.필립스글로에이람펜화브리에겐
Inventor： 빌헤름그라펜베르게트 , 게르드올켄
IPC: H03F3/26
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