Class 019
Non-Metallic Building Material Products
Articles of refractory material used in casting, bricks being refractory articles, ceramic refractory masses for lining metallurgical furnaces, natural refractory materials for repairing linings in high temperature vessels, refractory aggregates, refractory blocks for use as furnace linings, refractory bricks, refractory ceramic masses, refractory ceramic masses for covering metallurgical melts, refractory ceramic masses for lining channels, refractory ceramic masses for lining furnaces, refractory materials.
