79165373
Nov 20, 2014
Apr 5, 2016
Refractory construction materials, not of metal; refractory blocks not of metal; refractory bricks not of metal; bricks; furnace linings of non metallic materials; fused cast refractory blocks, not of metal; refractory blocks of corundum; refractory blocks of corundum-mullite; refractory blocks of corundum-zirconium oxide
Nonmetallic Building Materials