71.12.B - Other activities in the field of engineering and related technical consulting
36.00.Z - Water collection, treatment and supply
37.00.Z - Sewerage
42.21.Z - Construction of utility projects for fluids
42.22.Z - Construction of utility projects for electricity and telecommunications
42.91.Z - Construction of water projects
43.11.Z - Demolition
43.12.Z - Site preparation
43.13.Z - Test drilling and boring
43.21.Z - Electrical installation
43.22.Z - Plumbing, heat and air-conditioning installation
43.42.Z - Other specialised construction activities in construction of buildings
68.12.A - Construction projects related to the erection of residential buildings
68.12.B - Construction projects related to the erection of non-residential buildings
71.20.C - Other technical research and analyses
82.10.Z - Office administrative and support activities