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经营范围
发明名称
Automatic volume control circuit
摘要
申请公布号
US2563052(A)
申请公布日期
1951.08.07
申请号
US19470750208
申请日期
1947.05.24
申请人
RADIO CORPORATION OF AMERICA
发明人
MACSORLEY OLIN L.
分类号
H03G3/22
主分类号
H03G3/22
代理机构
代理人
主权项
地址
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Additive for lubricants
