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经营范围
发明名称
Improvements in or relating to cable communication systems
摘要
申请公布号
GB417054(A)
申请公布日期
1934.09.24
申请号
GB19330008776
申请日期
1933.03.23
申请人
WESTERN ELECTRIC COMPANY
发明人
分类号
H04B3/34
主分类号
H04B3/34
代理机构
代理人
主权项
地址
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