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经营范围
发明名称
TELEPHONE EXCHANGE
摘要
申请公布号
JPH03222559(A)
申请公布日期
1991.10.01
申请号
JP19900016268
申请日期
1990.01.29
申请人
NEC CORP
发明人
SAITO YUKINOBU
分类号
H04M3/00
主分类号
H04M3/00
代理机构
代理人
主权项
地址
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