Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Θυρίδες ασφαλείας-el#Sense
Porta di guardia-it#Sense
Dobles puertas de seguridad-es#Sense
Guard gates-en#Sense
Dubblerade säkerhetsportar-sv#Sense
Puertas de guarda-es#Sense
Dobbelte sikkerhedsporte-da#Sense
Porta de guarda-pt#Sense
Portes de garde-fr#Sense
Dubbele kering-nl#Sense
Doppelte Sicherheitstore-de#Sense
Kaksinkertainen varoluukku-fi#Sense
Double safety lock gates-en#Sense