Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Lavado con crudos-es#Sense
COW-pl#Sense
Lavage au pétrole brut-fr#Sense
Crude oil washing-en#Sense
COW-en#Sense
Mycie zbiorników ropą naftową-pl#Sense