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发明名称
PRIVATE BRANCH EXCHANGE
摘要
申请公布号
JPH03186094(A)
申请公布日期
1991.08.14
申请号
JP19890325335
申请日期
1989.12.15
申请人
NEC CORP
发明人
SHIMIZU KEISUKE;YAMAGIWA KAZUO;HAMOTO KOUICHI
分类号
H04Q3/58;H04L12/28
主分类号
H04Q3/58
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