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发明名称
Perfectionnements aux systèmes de signalisation utilisant des ondes modulées
摘要
申请公布号
FR733626(A)
申请公布日期
1932.10.08
申请号
FRD733626
申请日期
1931.06.15
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H03C1/52;H04B7/005;H04B14/00;H04B14/08
主分类号
H03C1/52
代理机构
代理人
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