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发明名称
CIRCUIT IDENTITY SEARCH IN A TELEPHONE EXCHANGE
摘要
申请公布号
GB1217556(A)
申请公布日期
1970.12.31
申请号
GB19680019531
申请日期
1968.04.25
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
分类号
H04M3/08;H04Q3/00
主分类号
H04M3/08
代理机构
代理人
主权项
地址
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