Plastic filaments for 3D printing; Semi-worked thermoplastic filaments used for 3D printing; Semi-worked PLA (polylactic acid) filaments for use in 3D printing; Semi-worked ABS (acrylonitrile butadiene styrene) filaments for use in 3D printing; Carbon fibers, other than for textile use; Semi-processed synthetic resins; Semi-processed plastics; Plastic substances, semi-processed