Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/36
Is Reference of Normal to-en#Sense
Perpendicular to-en#Sense
Perpendiculaire à-fr#Sense
Loodrecht op-nl#Sense
Senkrecht zu-de#Sense
Lotrecht zu-de#Sense
Normaal op-nl#Sense
Perpendiculaire sur-fr#Sense