Explanatory notes
… grinding wheels and the like : 6804.21 - - Of agglomerated synthetic or natural diamond 6804.22 - - Of other … of considerable size, for crushing, grinding, pulping, etc., (e.g., for milling grain (upper or lower stones); … tools, for the trimming, polishing, sharpening , trueing or sometimes for the cutting of metals, stone, glass, plastics, …