3D printers; 3D printing pens; Conveyer belts; Conveyor belts; Extrusion machines for plastic; Gears and enclosed drives for industrial machinery; Industrial robots; Machine parts, namely, bearing housings; Machine parts, namely, nozzles which are parts of power-operated sprayers; Machines for plastics working; Metal working machines; Shaft couplings for machines; Three dimensional (3D) printers; Winding machines, packaging machines, conveying machines, particularly conveyor belts, roller con...