ABRASIVES AND PARTICLES USED AS ABRASIVES, NAMELY, ALUMINIUM OXIDE, SILICON CARBIDE, ALUMINA, ZIRCONIA AND CUBIC BORON NITRADE USED AS ARTIFICIAL ABRASIVES FOR MAKING SAND PAPER, SAND CLOTHS, GRINDING WHEELS, CUTTING WHEELS AND TOOLS AND USED IN THE PROCESSES OF AND/OR FOR BLASTING, POLISHING, LAPPING AND TUMBLING