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B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
B61L25/06—Indicating or recording the setting of track apparatus, e.g. of points, of signals
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FR376646D1906-02-141907-02-13Appareil enregistreur propre à etre utilisé avec des appareils signaleurs ainsi qu'à d'autres usages
ExpiredFR376646A
(fr)