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ATELIERS VAUCANSON
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ATELIERS VAUCANSON
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Application grantedgrantedCritical
Publication of FR677825ApublicationCriticalpatent/FR677825A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
B61L3/04—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling mechanically
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Engineering & Computer Science
(AREA)
Mechanical Engineering
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FR677825D1929-07-031929-07-03Dispositif perfectionné de répétition acoustique des signaux de chemin de fer
ExpiredFR677825A
(fr)