Building and construction materials, not of metal; refractory building and construction materials, not of metal; refractory ceramic shaped parts and refractory ceramic compounds; refractory ceramic masses; refractory ceramic workpieces; refractory bricks (not of metal); refractory shapes (not of metal); refractory moulded parts (not of metal); refractory ceramic molding compounds and castings; refractory ceramic parts, including composite parts; refractory ceramic mixtures; refractory cement;...