Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Offener Kreislauf-de#Sense
Direct systeem-nl#Sense
Open system-en#Sense
Sistema directo-es#Sense
Sistema directo-pt#Sense
Système à chauffage direct-fr#Sense
Suora järjestelmä-fi#Sense
Sistema diretto-it#Sense
Direct system-en#Sense
ΣÙστημα άμεσης θέρμανσης-el#Sense
Solfångarsystem med genomflöde i ett steg-sv#Sense
Circuito aberto-pt#Sense
Direkte system-da#Sense
Sistema a riscaldamento diretto-it#Sense
Sistema de calefacción directa-es#Sense
Ανοικτó σÙστημα-el#Sense