… grindstones, grinding wheels and the like, without frameworks, for grinding, sharpening, polishing, trueing or …
Explanatory notes
… grindstones, grinding wheels and the like, without frameworks, for grinding, sharpening, polishing, trueing or … a centre or core of rigid material (metal, wood, plastics, cork, etc.) on to which compact layers of agglomerated … be fitted with axles or spindles, but they must be without frameworks. Grinding stones with frameworks are classified …