machines for the controlled feeding of material in liquid, gaseous or particulate form, namely, vacuum pumps and positive displacement pumps; horizontal and vertical, single and multi-stage rotary and centrifugal pumps, volumetric and gravimetric controlled feeders and blenders for dry chemicals, pharmaceuticals, food products and plastics materials products; single and multi-auger feeding machines; and parts of and accessories for the aforementioned goods, namely, agitators, alternators, bea...