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经营范围
发明名称
MULTIPLE ACCESS LINE EXCHANGE
摘要
申请公布号
JPS6490644(A)
申请公布日期
1989.04.07
申请号
JP19870248350
申请日期
1987.09.30
申请人
NEC CORP
发明人
SHIMIZU HIROSHI
分类号
H04L12/40;H04L12/50
主分类号
H04L12/40
代理机构
代理人
主权项
地址
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