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经营范围
发明名称
Переходное устройство двухсторонней телефонной связи для перехода с двухпроводной линии на четырехпроводную
摘要
申请公布号
SU144526(A1)
申请公布日期
1961.11.30
申请号
SU19610692304
申请日期
1961.01.02
申请人
发明人
KOZLOV G.V.
分类号
H04B1/52
主分类号
H04B1/52
代理机构
代理人
主权项
地址
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