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经营范围
发明名称
MAINTENANCE CENTRALIZED CONTROL SYSTEM
摘要
申请公布号
JPH05167676(A)
申请公布日期
1993.07.02
申请号
JP19910330261
申请日期
1991.12.13
申请人
HITACHI LTD;NIPPON TELEGR & TELEPH CORP <NTT>
发明人
WADA MITSUHIRO;NAGAO MIYAO;IZUHARA YOSHIO;YASAKA SUSUMU
分类号
H04M3/00;H04M3/22
主分类号
H04M3/00
代理机构
代理人
主权项
地址
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