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发明名称
Automatic volume control
摘要
申请公布号
US1986644(A)
申请公布日期
1935.01.01
申请号
US19310564752
申请日期
1931.09.24
申请人
RADIO CORPORATION OF AMERICA
发明人
PFISTER ARTHUR
分类号
H03G7/00
主分类号
H03G7/00
代理机构
代理人
主权项
地址
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