43.21.Z - Electrical installation
27 - Manufacture of electrical equipment
35.1 - Electric power generation, transmission and distribution
41.10.Z - Realization of building projects related to erection of buildings
42.22.Z - Construction of utility projects for electricity and telecommunications
42.9 - Construction of other civil engineering projects
43.12.Z - Site preparation
43.13.Z - Test drilling and boring
68.2 - Rental and operating of own or leased real estate
72.19.Z - Other research and experimental development on natural sciences and engineering