Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/3226
Is Reference of Passivt system-sv#Sense
Passief systeem-nl#Sense
Passivsystem-de#Sense
Passivt system-da#Sense
Παθητικό σύστημα-el#Sense
Sistema passivo-pt#Sense
Système passif-fr#Sense
Sistema pasivo-es#Sense
Passiivinen järjestelmä-fi#Sense
Passive system-en#Sense