Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of WIS-en#Sense
Treinbeïnvloedingssysteem-nl#Sense
Córas iniúchta ar thaobh bealaigh-ga#Sense
Wayside system-en#Sense
Wayside inspection system-en#Sense
Système de signalisation et de commande en bordure des voies-fr#Sense