Manufacture of measuring, controlling, laboratory and scientific instruments; surgical, medical and dental instruments and supplies. The manufacture of optical instruments for scientific and medical use is classified in group 392 (Manufacture of photographic and optical goods); the manufacture of X-ray and electric therapeutic apparatus is classified in group 370 (Manufacture of electrical machinery, apparatus, appliances and supplies), and the production of measuring and dispensing pumps is classified in group 360 (Manufacture of machinery, except electrical machinery).