Plastic sheet materials for use in manufacture; plastic substances, semi-processed; plastics fibres for use in the manufacture of packings; plastics fibres for use in the manufacture of seals; plastics fibres other than for textile use; plastics in extruded form for use in manufacture; plastics in extruded form used in production; chemical fibres not for textile use; plastic fibres, not for use in textiles; plastic material in extruded form for use in production; carbon fibres; composite plas...