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发明名称
TELEPHONE EXCHANGE CONFERENCE CIRCUIT
摘要
申请公布号
GB2128448(A)
申请公布日期
1984.04.26
申请号
GB19820028844
申请日期
1982.10.08
申请人
* STANDARD TELEPHONES AND CABLES PUBLIC LIMITED COMPANY
发明人
GARY ALFRED * SARSON;MICHAEL PAUL * MCKENZIE
分类号
H04M3/56;(IPC1-7):H04M3/56
主分类号
H04M3/56
代理机构
代理人
主权项
地址
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