Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/68
Is Reference of Photogravure électrololytique-fr#Sense
Gravure électrolytique-fr#Sense
Electrolytic engraving-en#Sense
Electrolitic etching-en#Sense
Electrolytic photoengraving-en#Sense