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经营范围
发明名称
NOISE CONTROL CIRCUIT
摘要
申请公布号
GB8315046(D0)
申请公布日期
1983.07.06
申请号
GB19830015046
申请日期
1983.06.01
申请人
BRITISH TELECOMMUNICATIONS
发明人
分类号
H04B3/20;(IPC1-7):H04B3/20
主分类号
H04B3/20
代理机构
代理人
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地址
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