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发明名称
Improvements in or relating to telecommunication systems
摘要
申请公布号
GB537001(A)
申请公布日期
1941.06.05
申请号
GB19390021607
申请日期
1939.07.25
申请人
STANDARD TELEPHONES AND CABLES LIMITED;ESMOND PHILIP GOODWIN WRIGHT
发明人
分类号
H04J1/00;H04M7/16
主分类号
H04J1/00
代理机构
代理人
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