3D printers; accessories for 3D printers, namely, machines for processing plastics and dissolving machines for chemical processing, for use with 3D printers, Processing machines using processing liquids for the treatment of 3D objects; Processing machines using processing gases for the treatment of 3D objects; parts for 3D printers, namely, mechanical elements being structural parts of 3D printers, robotic mechanisms for working plastic material; covers specially adapted for 3D printers; fila...