17 Semi-worked plastic substances in the form of pellets, rods, foils, foams, fibers, films and sheets; semi-processed bio-degradable plastics; semi processed plastics; semi-finished plastic products in the form of pellets, rods, foils, foams, fibers, films and sheets; semi processed artificial resins; semi-processed synthetic resins; semi processed resins; semi finished articles in the form of pellets, rods, foils, foams, fibers, films and sheets made from synthetic resins and artificial resins; semi-finished polyamide resins in the form of foils and sheets; semi-finished polyamide resins for use in further manufacture; semi-processed polycarbonate resins