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经营范围
发明名称
KEY TELEPHONE SYSTEM
摘要
申请公布号
JPH0292092(A)
申请公布日期
1990.03.30
申请号
JP19880245095
申请日期
1988.09.28
申请人
NEC CORP
发明人
OTA SEIZO
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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