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经营范围
发明名称
LINE SWITCHING SYSTEM
摘要
申请公布号
JPH02272953(A)
申请公布日期
1990.11.07
申请号
JP19890093152
申请日期
1989.04.14
申请人
NEC CORP
发明人
TANABE JUNJI
分类号
H04M3/18
主分类号
H04M3/18
代理机构
代理人
主权项
地址
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