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经营范围
发明名称
PRIVATE BRANCH EXCHANGE
摘要
申请公布号
JPS645254(A)
申请公布日期
1989.01.10
申请号
JP19870162636
申请日期
1987.06.29
申请人
NEC CORP
发明人
NISHIMURA KOJI
分类号
H04M3/42
主分类号
H04M3/42
代理机构
代理人
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