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发明名称
SIGNALLING SYSTEM
摘要
申请公布号
GB2052920(B)
申请公布日期
1983.07.20
申请号
GB19800014558
申请日期
1980.05.01
申请人
ISEC
发明人
分类号
G06F9/46;H04Q3/545;(IPC1-7):H04Q3/54
主分类号
G06F9/46
代理机构
代理人
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地址
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