Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Leak tightness-en#Sense
Étanchéité-fr#Sense
Dichtigkeit-de#Sense
Lekdichtheid-nl#Sense
Grado di impermeabilita-it#Sense
Degré d'étanchéité-fr#Sense
Lecksicherheit-de#Sense
Impermeabilita-it#Sense