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发明名称
PRIVATE BRANCH EXCHANGE SYSTEM
摘要
申请公布号
JPH02294195(A)
申请公布日期
1990.12.05
申请号
JP19890114124
申请日期
1989.05.09
申请人
NIPPON TELEGR & TELEPH CORP <NTT>
发明人
HIRABAYASHI MEGUMI;KABETANI KIYOSHI
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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