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发明名称
Indicateur électrique d'itinéraires
摘要
申请公布号
FR48666(E)
申请公布日期
1938.05.23
申请号
FRD48666
申请日期
1937.01.18
申请人
COMPAGNIE DU CHEMIN DE FER METROPOLITAIN DE PARIS
发明人
分类号
B61L21/04
主分类号
B61L21/04
代理机构
代理人
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