43.22.Z - Plumbing, heat and air-conditioning installation
33.12.Z - Repair and maintenance of machinery
33.20.Z - Installation of industrial machinery and equipment and outfit
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
42.99.Z - Works related to construction of other civil engineering projects not elsewhere classified
43.99.Z - Other specialised construction activities not elsewhere classified
71.12.Z - Engineering activities and related technical consultancy
71.20.B - Other technical testing and analysis
74.10.Z - Specialised design activities
74.90.Z - Other professional, scientific and technical activities not elsewhere classified