43.21.Z - Electrical installation
33.14.Z - Repair and maintenance of electrical equipment
33.20 - Installation of industrial machinery and equipment
41.00.A - Construction of residential buildings
41.00.B - Construction of non-residential buildings
42.22 - Construction of utility projects for electricity and telecommunications
43.22 - Plumbing, heat and air-conditioning installation
71.12 - Engineering activities and related technical consultancy
71.20 - Technical testing and analysis
77.32 - Rental and leasing of construction and civil engineering machinery and equipment