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发明名称
Telecommunications exchange
摘要
申请公布号
GB2073546(A)
申请公布日期
1981.10.14
申请号
GB19810004769
申请日期
1981.02.16
申请人
PLESSEY CO LTD
发明人
分类号
H04Q11/04;(IPC1-7):H04M3/00
主分类号
H04Q11/04
代理机构
代理人
主权项
地址
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