37 Installation, maintenance and repair of machines for transforming plastics, paint processing machines and apparatus, printers' pastes, coatings, sheets, plastics, electrostatic coating machines, middle, high and ultrahigh frequency range generators for stimulating, producing, regulating and controlling plasma, apparatus and installations for the production of X-rays, radiographic components, particle accelerators, electron guns, electron tubes and apparatus and installations for generating electronic radiation for industrial purposes; installation, maintenance and repair of industrial machinery; installation, maintenance and repair of industrial machinery and manufacturing plants; installation, maintenance and repair of machines for transforming plastics; installation, maintenance and repair of electric and electronic apparatus and equipment; installation, maintenance and repair of computer hardware and computer peripherals for managing and controlling machines, apparatus and installations for producing X-rays, radiographic components, particle accelerators, electron guns, electron tubes and electronic radiation for industrial applications; disinfection; all the aforesaid services not intended for precision tools and machining machine tools