- 71.12 — Activities in the field of engineering, geology and geodesy, provision of technical advice in these areas
- 43.21 — Electric installation work
- 43.22 — Installation water supply systems, heating and air conditioning
- 43.29 — Other construction installation works
- 80.20 — Security systems maintenance
- 71.20 — Technical control and analysis
Design / Installation / Maintenance of fire automatics / Alert people about the fire / lightning protection system / Fire protection of building structures.