Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Seal plate-en#Sense
Plein-joint-fr#Sense
Blinde flens-nl#Sense
Blindflansch-de#Sense
Blind flange-en#Sense
Blank flange-en#Sense
Bride pleine-fr#Sense