refractory building and construction materials, not of metal; refractory ceramic shaped parts and refractory ceramic compounds, namely, refractory ceramic shapes for use in furnaces and refractory ceramic shapes for use in continuous casting plants; refractory ceramic masses in the nature of refractory castable mixes not of metal and refractory concrete; refractory ceramic workpieces in the nature of refractory shapes not of metal; refractory bricks, not of metal; refractory shapes, not of me...