Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Støbejernsrør-da#Sense
Canalisation en asphalte coulé-fr#Sense
Tubazione-it#Sense
Gietijzeren afvoerbuis-nl#Sense
GA-Rohr-de#Sense
Gusseisenabflussrohr-de#Sense
Gussasphalt pipe-en#Sense