Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Drainage by ditches or gutters-en#Sense
Drainage par rigoles-fr#Sense
Drenaggio con canaletti-it#Sense
Begreppelen-nl#Sense
Αποστράγγιση μέσω αυλάκων-el#Sense
Graben-Entwaesserung-de#Sense
Grøftedræning-da#Sense