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发明名称
IMPROVEMENTS IN OR RELATING TO TELECOMMUNICATION EXCHANGES
摘要
申请公布号
IE40537(B1)
申请公布日期
1979.06.20
申请号
IE19740002273
申请日期
1974.11.05
申请人
INTERNATIONAL STANDART ELECTRIC CORP
发明人
分类号
H04Q3/545;(IPC1-7):H04Q3/54
主分类号
H04Q3/545
代理机构
代理人
主权项
地址
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