1 chemicals used in industry, science, agriculture, horticulture and forestry; adhesives used in industry; and chemicals for use in the cement and concrete industry
9 scientific, surveying, weighing, measuring, signaling and checking (supervision) apparatus and instruments; and computer hardware and software
17 rubber, gutta-percha, gum and goods made from these materials; plastics in extruded form for use in manufacture; packing, stopping and insulating materials; and flexible pipes not of metal
19 concrete, transportable cement, cement as well as other non-metallic building materials; non-metallic rigid pipes for building; asphalt, pitch and bitumen; non-metallic transportable buildings and monuments not of metal