71.12.Z - Engineering activities and related technical consultancy
08.11.Z - Quarrying of ornamental stone, limestone, gypsum, slate and other stone
08.12.Z - Operation of gravel and sand pits and mining of clay and kaolin
08.91.Z - Mining of chemical and fertiliser minerals
08.99.Z - Other mining and quarrying n.e.c.
09.10.Z - Support activities for petroleum and natural gas extraction
09.90.Z - Support activities for other mining and quarrying
43.13.Z - Test drilling and boring
43.99.Z - Other specialised construction activities n.e.c.
71.20.B - Inspection and issuance of opinions on the technical condition of chimneys and ventilation ducts