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Publication of FR835184ApublicationCriticalpatent/FR835184A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L21/00—Station blocking between signal boxes in one yard
B61L21/06—Vehicle-on-line indication; Monitoring locking and release of the route
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FR835184D1937-08-301937-08-30Dispositif pour aider la manoeuvre de certains organes, par exemple, la manoeuvre des aiguilles de chemin de fer
ExpiredFR835184A
(fr)