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发明名称
CONFERENCE BRIDGE CIRCUIT ARRANGEMENT
摘要
申请公布号
GB8324058(D0)
申请公布日期
1983.10.12
申请号
GB19830024058
申请日期
1983.09.08
申请人
PLESSEY CO PLC
发明人
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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