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经营范围
发明名称
Perfectionnements aux amplificateurs basse fréquence
摘要
申请公布号
FR35661(E)
申请公布日期
1930.03.27
申请号
FRD35661
申请日期
1928.04.10
申请人
发明人
ARNAUD CHARLES
分类号
H03F3/02
主分类号
H03F3/02
代理机构
代理人
主权项
地址
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