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发明名称
Perfectionnements aux concentrateurs de trafic téléphonique
摘要
申请公布号
FR1230612(A)
申请公布日期
1960.09.19
申请号
FR19590791095
申请日期
1959.04.03
申请人
发明人
LUCAS PIERRE-MARIE;DUQUESNE JEAN
分类号
H04Q3/52
主分类号
H04Q3/52
代理机构
代理人
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