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发明名称
INFORMATION TRANSMISSION EQUIPMENT FOR LOOP TYPE TRANSMISSION LINE
摘要
申请公布号
JPH0338134(A)
申请公布日期
1991.02.19
申请号
JP19890171985
申请日期
1989.07.05
申请人
NEC CORP
发明人
KOYAMA RIKIZO
分类号
H04L12/42
主分类号
H04L12/42
代理机构
代理人
主权项
地址
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