43.99.Z - Other specialised construction activities not elsewhere classified
01.62.Z - Support activities for farm animal production
33.12.Z - Repair and maintenance of machinery
33.14.Z - Repair and maintenance of electrical equipment
35.11.Z - Production of electricity
41.20.Z - Building works related to erection of residential and non-residential buildings
42.11.Z - Works related to construction of roads and motorways
42.22.Z - Works related to construction of telecommunications and electricity lines
43.12.Z - Site preparation
43.21.Z - Electrical installation
43.22.Z - Plumbing, heat and air-conditioning installation
43.29.Z - Other construction installation
43.31.Z - Plastering
71.20.B - Other technical testing and analysis
74.10.Z - Specialised design activities