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经营范围
发明名称
ELECTRONIC EXCHANGE
摘要
申请公布号
JPH0250660(A)
申请公布日期
1990.02.20
申请号
JP19880199962
申请日期
1988.08.12
申请人
NEC CORP
发明人
SUDO KIYOSHI
分类号
H04M3/42;H04Q3/545
主分类号
H04M3/42
代理机构
代理人
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地址
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