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发明名称
Système de signalisation électriques
摘要
申请公布号
FR869497(A)
申请公布日期
1942.02.03
申请号
FRD869497
申请日期
1941.01.24
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H04Q1/45
主分类号
H04Q1/45
代理机构
代理人
主权项
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