Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Kuiluputous-fi#Sense
Cylinder drop-en#Sense
Well drop-en#Sense
Absturzschacht-de#Sense
Αναβαθμός τύπου φρέατος-el#Sense
Faldskakt-da#Sense
Overstortschacht-nl#Sense
Chute en puits-fr#Sense
Queda em poço-pt#Sense
Cylinder fall-en#Sense
Well fall-en#Sense
Energidämpande utskovsschakt-sv#Sense
Salto en pozo-es#Sense
Salto a pozzo-it#Sense