- 71.12 — Activities in the field of engineering, geology and geodesy, provision of technical advice in these areas
- 43.22 — Installation water supply systems, heating and air conditioning
- 46.90 — Non-specialized wholesale trade
- 74.90 — Other professional, scientific and technical activities, n.v.d.g.
- 41.20 — Construction of residential and non-residential buildings
- 42.21 — Construction of pipelines
Activity in the field of engineering