Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/2011
Is Reference of Fire-resisting glassware ... with a low coefficiency of expansion, similar to Pyrex, or Durex-en#Sense
Les objets ... en verre résistant au feu, à faible coefficient de dilatation, du genre Pyrex, Durex, etc-fr#Sense