Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/4826002
Is Reference of Op zwaartekracht werkend toevoersysteem-nl#Sense
Σύστημα τροφοδότησης διαμέσου της βαρύτητας-el#Sense
Gravity feed system-en#Sense
Putouspainejärjestelmä-fi#Sense