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发明名称
Dispositif de mise en écoute d'une opératrice en tandem sur les conversations automatiques
摘要
申请公布号
FR1020300(A)
申请公布日期
1953.02.04
申请号
FRD1020300
申请日期
1950.06.16
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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