37 Construction services; building services; construction and building services using refractory linings and industrial installations; construction and building services of industrial structures for use in the melting, treating and casting of metals; installation and repair services of refractory linings, industrial furnaces, industrial high-temperature aggregates, industrial installations for the melting of metals, tundishes [containers used in metal casting] and industrial installations for the treating and casting of metal melts; rental of tools, machines and equipment for construction, demolition, cleaning and maintenance purposes; consultancy and information in relation to the aforesaid services, included in this class.