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发明名称
TELEPHONE TRAFFIC MONITORING APPARATUS
摘要
申请公布号
GB1505642(A)
申请公布日期
1978.03.30
申请号
GB19740022056
申请日期
1975.05.08
申请人
BRITISH GAS CORP
发明人
分类号
H04M3/36;(IPC1-7):H04M15/08
主分类号
H04M3/36
代理机构
代理人
主权项
地址
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