3D printers; 3D printing pens; Extrusion machines for plastic; Extrusion moulding machines; Industrial robots; Machine parts, namely, wear plates and strips; Machine tools for forming, riveting, swaging, and flaring of metal and plastics; Machines for processing plastics; Metal working machines; Printing machines for commercial or industrial use; Printing machines for use on sheet metal; Three dimensional (3D) printers