Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Vermogensmarge-nl#Sense
Marge de sécurité-fr#Sense
Schwundreserve-de#Sense
Kraftreserve-da#Sense
Margen de potencia-es#Sense
Power margin-en#Sense