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发明名称
TELEPHONE EXCHANGE
摘要
申请公布号
JPH0253357(A)
申请公布日期
1990.02.22
申请号
JP19880205284
申请日期
1988.08.17
申请人
NEC CORP
发明人
OGATA ASAO
分类号
H04M3/42;H04M3/20
主分类号
H04M3/42
代理机构
代理人
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