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发明名称
Improvements in volume control circuits for thermionic amplifiers
摘要
申请公布号
GB514331(A)
申请公布日期
1939.11.06
申请号
GB19380013154
申请日期
1938.05.03
申请人
PHILCO RADIO AND TELEVISION CORPORATION
发明人
分类号
H03G3/08
主分类号
H03G3/08
代理机构
代理人
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