37 Installation, assembly, maintenance and maintainance services, in relation to the following goods, push buttons, pressure switches, light push-buttons and switches, built-in buttons, command and alarm systems and parts therefor, multi-circuit and flip switches, signal lights, single or multiple signal lamps, contactless push-buttons and switches, contactless light push-buttons and switches, contactless micro switches, contactless built-in switches, components for input keyboards, electric and electronic sensors, terminals and monitors peripheral devices for data, control and information technology, namely keyboards, printers, plotters, end decoders, acoustic couplers, cassette recorders and code readers, electronic controls, electrical and mechanical switches, especially lock switches, rotary and rocker switches, electronic assemblies, foil keyboards and switch foils, data processors and computers; building and construction consultancy, in relation to the following goods: electric and electronic components, electric and/or electronic apparatus, electrical and electronic installations.