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发明名称
AMPLIFYING VALVES
摘要
申请公布号
IE23780(L)
申请公布日期
1959.06.30
申请号
IE19580000754
申请日期
1958.12.31
申请人
N.V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H01J21/14;(IPC1-7):H01J21/14
主分类号
H01J21/14
代理机构
代理人
主权项
地址
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