Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/6611001
Is Reference of Drilling string-en#Sense
Colonne(de tiges)de forage-fr#Sense
Colonna di perforazione-it#Sense
Zug-de#Sense
Trek-nl#Sense
Train de tiges de forage-fr#Sense
Stand-en#Sense
Εξολκέας-el#Sense