Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/6831
Is Reference of Prova di solidita calcestruzzo-it#Sense
Hammerproef-nl#Sense
Afprøvning med hammer-da#Sense
Hammer testing-en#Sense
Prüfen des Betons mit Betonprüfhammer-de#Sense
Abklopfen-de#Sense
Essai de dureté du béton-fr#Sense