Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Peep hole-en#Sense
Oogje -nl#Sense
Barrel loop-en#Sense
Mirilla del visor-es#Sense
Oeilleton -fr#Sense
InspektionshÄl-sv#Sense
Lochblende -de#Sense
Muszka -pl#Sense
Aperture-en#Sense