Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/2831002
Is Reference of Negatieve perforatie-nl#Sense
Tonvormige perforatie-nl#Sense
Negative perforation-en#Sense
Tonnenfoermige Lochung-de#Sense
Perforazione negativa-it#Sense
Perforation négative-fr#Sense
Perforation en tonneau-fr#Sense
Barrel-shaped perforation-en#Sense
Αρνητική διάτρηση-el#Sense
Negativ perforering-da#Sense
Negativ-Lochung-de#Sense
Perforazione a barile-it#Sense