Millstones, grindstones, grinding wheels and the like, without frameworks, for sharpening, polishing, trueing or cutting, of artificial abrasives, with binder of ceramics or silicates (excl. of agglomerated synthetic or natural diamond, hand sharpening or polishing stones, perfumed pumice stones, and grinding wheels etc. specifically for dental drill engines)
Millstones, grindstones, grinding wheels and the like, without frameworks, for sharpening, polishing, trueing or cutting, of artificial abrasives, with binder of other than of synthetic or artificial resin, ceramics or silicates (excl. of agglomerated synthetic or natural diamond, hand sharpening or polishing stones, perfumed pumice stones, and grinding wheels etc. specifically for dental drill engines)