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经营范围
发明名称
KEY TELEPHONE SYSTEM
摘要
申请公布号
JPH03108994(A)
申请公布日期
1991.05.09
申请号
JP19890246723
申请日期
1989.09.22
申请人
NEC CORP
发明人
MATSUMURA HIDEKO
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
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