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发明名称
Improvements in subscribers' line circuits for automatic exchange systems
摘要
申请公布号
GB888356(A)
申请公布日期
1962.01.31
申请号
GB19570037484
申请日期
1957.12.02
申请人
ASSOCIATED ELECTRICAL INDUSTRIES LIMITED
发明人
WARMAN BLOOMFIELD JAMES
分类号
H04M1/738;H04Q3/00
主分类号
H04M1/738
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