machine and machine tools, namely, centrifuges for extraction of oil from shavings, conveyors, centrifuges and shavings collecting silos sold as a unit; filtering equipment for industrial use, namely, filtering units for coolants, oil, sludge, fluids and other viscous materials; depurators for filtering, cleansing and purifying metallic shavings, magnetic separators for removing metallic shavings, transporters of metallic and non-metallic shavings, self-cleaning drum filters, parts thereof