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经营范围
发明名称
Improved means of volume and tone control in audio-frequency amplifiers
摘要
申请公布号
GB476877(A)
申请公布日期
1937.12.13
申请号
GB19360016573
申请日期
1936.06.13
申请人
OSWALD BARBER SNEATH
发明人
分类号
H03G9/08
主分类号
H03G9/08
代理机构
代理人
主权项
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