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发明名称
Improvements in telecommunication systems
摘要
申请公布号
GB654170(A)
申请公布日期
1951.06.06
申请号
GB19470032116
申请日期
1947.12.05
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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