Ear plugs not for medical purposes, ozonisers, electrolysers, egg-candlers, cash registers, coin counting or sorting machines, electric sign boards for displaying target figures and current outputs, photo-copying machines, hand-held calculators, time and date stamping machines, time clocks, punched card machines for offices, voting machines, automated machines that check whether postage stamp is affixed, vending machines, metered gasoline pumps, coin-operated gates for car parking, life nets,...