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CIE PARISIENNE DE DISTRIB D EL
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CIE PARISIENNE DE DISTRIB D EL
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Publication of FR729665ApublicationCriticalpatent/FR729665A/fr
G08G1/00—Traffic control systems for road vehicles
G08G1/07—Controlling traffic signals
G08G1/085—Controlling traffic signals using a free-running cyclic timer
FR729665D1932-01-121932-01-12Perfectionnements aux dispositifs de signalisation pour la circulation des piétons dans la traversée des chaussées
ExpiredFR729665A
(fr)