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经营范围
发明名称
KEY TELEPHONE SYSTEM
摘要
申请公布号
JPH027657(A)
申请公布日期
1990.01.11
申请号
JP19880157227
申请日期
1988.06.24
申请人
NEC CORP
发明人
SUGAWARA NAOKI
分类号
H04M15/34
主分类号
H04M15/34
代理机构
代理人
主权项
地址
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