Explanatory notes
… discs, segments, etc.), or in threads or cords, on to which crushed natural or artificial abrasives have been coated, … by the bonding substance. The abrasives used include emery, corundum, silicon carbide, garnet, pumice, flint, quartz, … smoothing or cleaning up metal, wood, cork, glass, leather, rubber (hardened or not) or plastics; also for smoothing or …