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发明名称
Automatic volume control system
摘要
申请公布号
US2538772(A)
申请公布日期
1951.01.23
申请号
US19430483819
申请日期
1943.04.20
申请人
THE SPERRY CORPORATION
发明人
JR. THOMAS M. FERRILL,
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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