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发明名称
Improvements in or relating to telegraph systems
摘要
申请公布号
GB959806(A)
申请公布日期
1964.06.03
申请号
GB19610025993
申请日期
1961.07.18
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H04L25/04;H04L25/24
主分类号
H04L25/04
代理机构
代理人
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