Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Leitschicht-de#Sense
Radioledande skikt-sv#Sense
Camada reflectora-pt#Sense
Conduit radioélectrique-fr#Sense
Inversionslag-da#Sense
Radioconducto-es#Sense
Radio duct-en#Sense
Dukt-de#Sense
Canale radio-it#Sense
Radioduct-da#Sense
Radioduct-nl#Sense
Funkleitschicht-de#Sense
Ατμοσφαιρικός αγωγός ιδιόμορφης διάδοσης-el#Sense