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发明名称
ELECTRICAL SIGNAL TRANSMISSION SYSTEMS
摘要
申请公布号
GB1217696(A)
申请公布日期
1970.12.31
申请号
GB19680006733
申请日期
1968.02.12
申请人
NIPPON ELECTRIC COMPANY, LIMITED
发明人
分类号
H04J3/07
主分类号
H04J3/07
代理机构
代理人
主权项
地址
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