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发明名称
Perfectionnements aux installations téléphoniques automatiques
摘要
申请公布号
FR770520(A)
申请公布日期
1934.09.15
申请号
FRD770520
申请日期
1934.03.21
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
主权项
地址
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