Plastic substances, semi-processed; extruded plastics in the form of tubes for use in manufacturing; extruded plastics in the form of rods for use in manufacturing; extruded plastics in the form of blocks for use in manufacturing; extruded plastics in the form of sheet for use in manufacturing; plastic sign blanks for use in the production of machine parts; extruded plastic composite materials in the form of profiles, boards, pellets for use in manufacturing; extruded plastic composite materi...