Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Angles ( heavy section )-en#Sense
Zwaar hoekstaal-nl#Sense
Winkelstahl-de#Sense
Cornières ( grosses )-fr#Sense
Χαλυβογωνίες-el#Sense
Angolari ( pesanti )-it#Sense