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发明名称
LINE EXCHANGE NETWORK
摘要
申请公布号
JPH0336867(A)
申请公布日期
1991.02.18
申请号
JP19890172341
申请日期
1989.07.03
申请人
NEC CORP
发明人
ITO TOSHINORI
分类号
H04M7/00;H04L12/00;H04M11/00
主分类号
H04M7/00
代理机构
代理人
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