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发明名称
Improvements in or relating to trunk dialling telecommunication systems
摘要
申请公布号
GB1049475(A)
申请公布日期
1966.11.30
申请号
GB19640039542
申请日期
1964.09.29
申请人
EIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H04J3/17;H04Q3/00
主分类号
H04J3/17
代理机构
代理人
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地址
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