74.10.Z - Specialised design activities
24.20.Z - Manufacture of tubes and pipes, conduits, closed sections and connectors, of steel
25.11.Z - Manufacture of metal structures and parts of structures
25.93.Z - Manufacture of wire products, chains and springs
25.99.Z - Manufacture of other fabricated metal products not elsewhere classified
33.20.Z - Installation of industrial machinery and equipment and outfit
42.21.Z - Works related to construction of transmission pipelines and distribution networks
43.22.Z - Plumbing, heat and air-conditioning installation
43.29.Z - Other construction installation
43.99.Z - Other specialised construction activities not elsewhere classified
62.01.Z - Computer programming activities
71.12.Z - Engineering activities and related technical consultancy
71.20.B - Other technical testing and analysis
