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经营范围
发明名称
EXCHANGE EQUIPMENT OF COMMUNICATION NETWORK BY COMMON LINE SIGNAL SYSTEM
摘要
申请公布号
JPH03101359(A)
申请公布日期
1991.04.26
申请号
JP19890238628
申请日期
1989.09.13
申请人
NEC CORP
发明人
TOUZA YOSHIKAZU
分类号
H04M7/06;H04L12/00
主分类号
H04M7/06
代理机构
代理人
主权项
地址
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