43.22.Z - Plumbing, heat and air-conditioning installation
37.00.Z - Sewage disposal and treatment
74.90.Z - Other professional, scientific and technical activities not elsewhere classified
74.10.Z - Specialised design activities
72.19.Z - Other research and experimental development on natural sciences and engineering
71.20.B - Other technical testing and analysis
71.12.Z - Engineering activities and related technical consultancy
49.50.A - Transport via pipeline of fuel gases
47.91.Z - Retail sale via mail order houses or via internet
46.14.Z - Agents involved in the sale of machinery, industrial equipment, ships and aircraft
43.99.Z - Other specialised construction activities not elsewhere classified
43.29.Z - Other construction installation
43.21.Z - Electrical installation
43.13.Z - Test drilling and boring
42.21.Z - Works related to construction of transmission pipelines and distribution networks
38.31.Z - Dismantling of wrecks
25.21.Z - Manufacture of central heating radiators and boilers
36.00.Z - Water collection, treatment and supply
35.30.Z - Steam, hot water and air conditioning manufacturing and supply
35.11.Z - Production of electricity
33.20.Z - Installation of industrial machinery and equipment and outfit
33.19.Z - Repair and maintenance of other equipment
33.14.Z - Repair and maintenance of electrical equipment
33.13.Z - Repair and maintenance of electronic and optical equipment
33.12.Z - Repair and maintenance of machinery
33.11.Z - Repair and maintenance of fabricated metal products
28.25.Z - Manufacture of industrial cooling and ventilation equipment
28.21.Z - Manufacture of ovens, furnaces and furnace burners
27.12.Z - Manufacture of electricity distribution and control apparatus
26.51.Z - Manufacture of instruments and appliances for measuring, testing and navigation