Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Cuivre contenant de l'oxygène-fr#Sense
Iltholdigt kobber-da#Sense
Elektrolytisk kobber-da#Sense
Cruachopar pice-ga#Sense
Tough pitch copper-en#Sense
TPC-en#Sense