6
Valves and drain pipes; Valves of metal (other than parts of machines); waterpipe valves; Pipes of metal and junctions of metal for pipes
9
Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; Apparatus for recording, transmission or reproduction of sound or images; Magnetic data carriers, recording discs; Automatic vending machines and mechanisms for coin operated apparatus; Cash registers, calculating machines, data processing equipment and computers; Fire-extinguishing apparatus
42
Services provided by engineers, architects, physicists, chemists, computer scientists and draughtsmen all relating to the inspection, testing, security, availability, economic efficiency and structural integrity of electrical and industrial plants of all kinds; Science and technology services; Technical project studies, scientific and technological research; Analysis, industrial research and development of new products; Quality-control services; Computer software design and programming