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发明名称
ELECTRONIC TELEPHONE SYSTEM
摘要
申请公布号
GB1471364(A)
申请公布日期
1977.04.27
申请号
GB19740030569
申请日期
1974.07.10
申请人
STROMBERG CARLSON CORP
发明人
分类号
H04Q3/52;(IPC1-7):H04Q3/52
主分类号
H04Q3/52
代理机构
代理人
主权项
地址
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