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发明名称
Systèmes de contrôle du gain de dispositifs amplificateurs d'ondes
摘要
申请公布号
FR837622(A)
申请公布日期
1939.02.15
申请号
FRD837622
申请日期
1938.05.06
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H03F1/36;H03G3/22;H04B3/12
主分类号
H03F1/36
代理机构
代理人
主权项
地址
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