[ Grinders being power tools; ] Abrasive disks for power-operated grinders; [ Abrasive disks for power-operated sanders; ] Abrasive wheels for power-operated grinders; [ Chucks for power drills; Electric hand-held drills; Metal valves used in cleaning machines for gas turbine and combustion engines; Polishing machines for use in grinding and polishing metal, wood, ceramics and plastics; Power tools, namely, drills, circular saws; ] Power-operated abrasive wheels; Power-operated grinding wheel...