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经营范围
发明名称
Improvements in or relating to telephone trunk circuits
摘要
申请公布号
GB1116735(A)
申请公布日期
1968.06.12
申请号
GB19650050132
申请日期
1965.11.25
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
分类号
H04Q11/04
主分类号
H04Q11/04
代理机构
代理人
主权项
地址
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