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发明名称
LOOP TYPE N-1 ADDING SYSTEM
摘要
申请公布号
JPH06189005(A)
申请公布日期
1994.07.08
申请号
JP19920335967
申请日期
1992.12.16
申请人
HITACHI LTD;NIPPON TELEGR & TELEPH CORP <NTT>
发明人
HIROSE KAZUTO;MATSUI HIROYUKI;IBARAKI HISASHI
分类号
H04M3/56;H04L12/42;(IPC1-7):H04M3/56
主分类号
H04M3/56
代理机构
代理人
主权项
地址
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