Abrasive disks for power-operated grinders; Core drilling bits; Grinding and polishing machines; Grinding tools for grinding machines; Pads for floor polishing machines; Polishing discs for automated wet-polishing multi-head machines; Polishing system for use in single-head machines comprising grinding and polishing discs for stone profiling and edges; Polycrystalline diamond compact (PDC) drill bits for drilling machines; Power-operated angle grinders; Power-operated grinding wheels; Power d...