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发明名称
PRIVATE AUTOMATIC BRANCH EXCHANGE WITH EXTENSION CLASS REVISION SYSTEM
摘要
申请公布号
JPH03280767(A)
申请公布日期
1991.12.11
申请号
JP19900082750
申请日期
1990.03.29
申请人
NEC CORP
发明人
YOSHIMOTO SHIRO
分类号
H04M3/42;H04M3/38;H04M3/533
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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