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经营范围
发明名称
KEY TELEPHONE SYSTEM
摘要
申请公布号
JPS6416196(A)
申请公布日期
1989.01.19
申请号
JP19870172203
申请日期
1987.07.10
申请人
NEC ENG LTD
发明人
NAKAGAWA YUJIRO
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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