3D-printing for others; custom additive manufacturing; custom 3D-printing of components, parts and spare parts; milling in the nature of custom manufacturing of ceramics, metal, metal alloys and plastics for the production of components, parts and spare parts; extruding in the nature of custom manufacturing of ceramics, metal, metal alloys and plastics for the production of components, parts and spare parts; custom manufacture of components, parts and spare parts made with ceramics, metal and...