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发明名称
TELECOMMUNICATIONS EXCHANGE
摘要
申请公布号
SG42587(G)
申请公布日期
1987.11.13
申请号
SG19870000425
申请日期
1987.05.07
申请人
STC PLC
发明人
分类号
H04Q11/04;(IPC1-7):H04Q11/04
主分类号
H04Q11/04
代理机构
代理人
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地址
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