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经营范围
发明名称
High frequency thermionic valve amplifier
摘要
申请公布号
GB310979(A)
申请公布日期
1930.09.18
申请号
GB19290013979
申请日期
1929.05.04
申请人
MANFRED VON ARDENNE
发明人
分类号
H03F1/08
主分类号
H03F1/08
代理机构
代理人
主权项
地址
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