Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Niederdruck-Polyäthylen-de#Sense
Polyäthylen hoher Dichte-de#Sense
Polyéthylène haute densité-fr#Sense
HD-polyethylene-en#Sense
HD-polyethylen-da#Sense