Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Forvarmning-da#Sense
Precalentamiento-es#Sense
Esilämmitys-fi#Sense
Voorverwarming-nl#Sense
Vorerwaermung-de#Sense
Preheating-en#Sense
Preriscaldamento-it#Sense
Pré-aquecimento-pt#Sense
Προθέρμανση-el#Sense
Préchauffage-fr#Sense
Förvärmning-sv#Sense