71.12.Z - Engineering activities and related technical consultancy
09.90.Z - Support activities for other mining and quarrying
41.20.Z - Building works related to erection of residential and non-residential buildings
42.99.Z - Construction of other civil engineering projects n.e.c.
43.13.Z - Test drilling and boring
71.20.B - Inspection and issuance of opinions on the technical condition of chimneys and ventilation ducts
72.19.Z - Other research and experimental development on natural sciences and engineering
74.10.Z - Specialised design activities
74.90.Z - Other professional, scientific and technical activities not elsewhere classified
82.99.Z - Other business support service activities not elsewhere classified