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经营范围
发明名称
Improvements in or relating to automatic telephone exchanges
摘要
申请公布号
GB391445(A)
申请公布日期
1933.04.26
申请号
GB19310029693
申请日期
1931.10.26
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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