7 Machine parts, namely, nozzles which are parts of compressed air systems for part cleaning, chip removal, part drying, liquid blowoff, part cooling, material conveying, part ejection, and air assist, and components thereof; machine parts, namely, air knives, air wipes, air jets, air amplifiers, and air guns which are parts of compressed air systems for part cooling, material conveying, part ejection, and air assist, and components thereof; machine parts, namely, atomizing nozzles for mixing liquids and compressed air for spraying coatings, cleaning, and painting parts; machine parts for compressed air systems, namely, air hoses, filters, pressure regulators, mufflers, metal pipe fittings, and magnetic bases, and components thereof; vacuum cleaners powered by compressed air for use in industrial environments, and components thereof; wet-dry vacuums powered by compressed air for use in industrial environments, and components thereof; pneumatic tube conveyors; vacuum pumps operated by compressed air, namely, vacuum generators that use venturis; none of the foregoing for use in domestic or commercial, as opposed to industrial, environments