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发明名称
Volume control system
摘要
申请公布号
US2010002(A)
申请公布日期
1935.08.06
申请号
US19310548695
申请日期
1931.07.03
申请人
ADAIR GEORGE P
发明人
ADAIR GEORGE P.
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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