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经营范围
发明名称
Improvements in or relating to direct current amplifiers
摘要
申请公布号
GB865125(A)
申请公布日期
1961.04.12
申请号
GB19590031408
申请日期
1959.09.15
申请人
TELEFUNKEN G.M.B.H.
发明人
分类号
H03F3/36
主分类号
H03F3/36
代理机构
代理人
主权项
地址
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