17 Rubber, gutta-percha, mica and rubber gum; plastics in extruded form, extruded artificial resins, elastomeric polymers, natural resins and elastomeric natural polymers in bars, blocks, pellets, rods, sheets and tubes, with synthetic and/or natural reinforcing fibres, for general industrial use; natural resins in bars, blocks, pellets, rods, sheets and tubes for general industrial use; semi-processed plastics and polymers in the form of pellets, granules, sheets, blocks and powders, including with synthetic and/or natural fibre reinforcing fibres, for use in manufacturing; semi-processed polyactide and cellulose esters in pellet form, granule form, sheet form and powder form, including with synthetic and/or natural reinforcing fibres, for use in production of composite materials and synthetic- and composite materials; semi-processed natural polymers in the form of pellets, granules, sheets, blocks and powders, including with synthetic and/or natural reinforcing fibres for use in composite materials and synthetic- and composite materials