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发明名称
LINE EXCHANGE TYPE LOOP NETWORK
摘要
申请公布号
JPS6121649(A)
申请公布日期
1986.01.30
申请号
JP19840142829
申请日期
1984.07.10
申请人
HITACHI DENSEN KK
发明人
IMAI MITSUO
分类号
主分类号
代理机构
代理人
主权项
地址
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