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发明名称
Improvements in and relating to electrical communication systems and apparatus
摘要
申请公布号
GB774292(A)
申请公布日期
1957.05.08
申请号
GB19540006229
申请日期
1954.03.03
申请人
BRITISH TELECOMMUNICATIONS RESEARCH LIMITED
发明人
DAIN GORDON TAYLOR
分类号
H04L12/00
主分类号
H04L12/00
代理机构
代理人
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