Building materials not made of metal; artificial stone made from inorganic fillers combined with resin, polymeric concrete, or concrete made of reactive resin; molds made of artificial stone in particular as a substitute for metal molds for tool-making equipment

building materials not made of metal, namely, artificial stone made from inorganic fillers combined with resin, polymeric concrete or concrete made of reactive resin; molds made of artificial stone in particular as a substitute for metal molds for tool-making equipment