7 machines, namely, milking machines and component parts thereof; [ butter and margarine making machines; machines for the preparation and treatment of liquid, viscous or solid foodstuffs, namely, centrifuges, water pumps, units for draining whey from cheese curds, mixers and centrifugal pumps used in conjunction with industrial centrifuges, ] vacuum pumps, milk pumps, teat cups and parts thereof; [ separators, namely, cream separators, whey separators, and liquid separators in which a liquid is one of the component parts of the material treated, centrifuges for separating liquids, such as contaminants from water; oil separators; cyclones; ] package forming, filling, and sealing machines for simultaneously making, filling and sealing non-vitreous packages made of flexible sheet material; food and beverage carton forming, filling and sealing machines; plastic shaping machines, namely, vacuum forming machines, injection molding machines, blow forming machines; distribution machines for packaged liquid food products, namely, conveyors, tray packers and shrink wrappers; cleaning in place machines for cleaning food processing and packaging machines; [ machines for forming, breading, cutting, slicing, mincing and mixing foodstuffs; ] machines for continuously mixing, freezing, filling, extruding and packaging frozen foodstuffs, all sold as a unit; filtering machines for the separation of liquids; pulp cleaning machines; decanting machines for separating liquids from each other; and component parts for all of the foregoing