Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Canale telefonico-it#Sense
Voiceband circuit-en#Sense
Circuito de banda vocal-es#Sense
Canal telefónico-pt#Sense
Spraakbandcircuit-nl#Sense
Τηλεφωνικό κανάλι-el#Sense
Fernsprechkanal-de#Sense
Talebåndskredsløb-da#Sense
Talkanal-sv#Sense
Canal téléphonique-fr#Sense
Puhekaistajohto-fi#Sense
Tonfrequenzkanal-de#Sense