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发明名称
Improvements in or relating to selector testing circuits
摘要
申请公布号
GB308609(A)
申请公布日期
1930.06.23
申请号
GB19290009300
申请日期
1929.03.22
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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