3D printers; Belt pulleys being parts of machines; Electric fans, ventilators and blowers for motors and engines; Electric motors, and their parts, not for land vehicles; Engine bearings; Extrusion machines for plastic; Gears and enclosed drives for industrial machinery; Gears, other than for land vehicles; Heat sinks for use in machines; Lathes; Machine parts, namely, bearings; Machine parts, namely, nozzles which are parts of power-operated sprayers; Three dimensional (3D) printers