Abrasive wheels for power-operated grinders; Apparatus for aerating beverages; Cleaning appliances utilizing steam; Dust exhausting installations for cleaning purposes; Electric arc welding apparatus; Electric hammers; Electric hand-held drills; Lawn mowers; Machines and apparatus for carpet shampooing, electric; Paint spray guns; Power-driven wrenches; Power-operated angle grinders; Screwdrivers, electric; Snow ploughs; Soldering irons, electric