Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Orificio central-es#Sense
Κεντρική οπή-el#Sense
Furo central-pt#Sense
Drilled centre-en#Sense
Foro centrale-it#Sense
Centrale opening-nl#Sense
Lochung-de#Sense
Trou central-fr#Sense
Agujero central-es#Sense
Centerhul-da#Sense