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Publication of FR409927ApublicationCriticalpatent/FR409927A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
B61L23/22—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in two directions over the same pair of rails
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FR409927A1909-01-231909-12-03Dispositif automatique de protection ou de sécurité pour voie unique avec trains circulant dans les deux sens
ExpiredFR409927A
(fr)