33.20.Z - Installation of industrial machinery and equipment and outfit
25.21.Z - Manufacture of central heating radiators and boilers
25.30.Z - Manufacture of steam generators, except central heating hot water boilers
25.62.Z - Mechanical working of metal elements
28.21.Z - Manufacture of ovens, furnaces and furnace burners
33.11.Z - Repair and maintenance of fabricated metal products
41.10.Z - Realization of building projects related to erection of buildings
41.20.Z - Building works related to erection of residential and non-residential buildings
42.21.Z - Works related to construction of transmission pipelines and distribution networks
42.22.Z - Works related to construction of telecommunications and electricity lines
43.11.Z - Demolition
43.12.Z - Site preparation
43.22.Z - Plumbing, heat and air-conditioning installation
43.99.Z - Other specialised construction activities not elsewhere classified
