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发明名称
TELECOMMUNICATION SYSTEM LOOP-BACK UNIT
摘要
申请公布号
GB8308775(D0)
申请公布日期
1983.05.11
申请号
GB19830008775
申请日期
1983.03.30
申请人
GENERAL ELECTRIC CO PLC
发明人
分类号
H04M3/30;(IPC1-7):H04M3/30
主分类号
H04M3/30
代理机构
代理人
主权项
地址
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