Ceramic refractory material, namely, ceramic refractory construction and repair materials in the nature of bricks, refractory mortars, fired refractory materials, refractory shapes, refractory construction materials, not of metal; ceramic refractory bricks, refractory mortars, fired refractory materials not of metal, refractory shapes not of metal, refractory construction materials not of metal, all for coke oven walls; ceramic refractory material made of double fuse silica for coke oven wall...