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发明名称
Réseaux modificateurs de transmission utilisables notamment dans les systèmes de signalisation électrique
摘要
申请公布号
FR831555(A)
申请公布日期
1938.09.08
申请号
FRD831555
申请日期
1937.12.31
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H03H2/00
主分类号
H03H2/00
代理机构
代理人
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