Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Niveles de pompa-es#Sense
Spirit levels-en#Sense
Livelle a bolla-it#Sense
Níveis de bolha-pt#Sense
Luchtbelwaterpassen-nl#Sense
Niveaux à bulle-fr#Sense
Vaterpas-da#Sense
Wasserwaagen-de#Sense
Vattenpass-sv#Sense