| 71250000 |
Architectural, engineering and surveying services |
Architectural and related services |
| 09323000 |
District heating |
Steam, hot water and associated products |
| 45255500 |
Drilling and exploration work |
Construction work for the oil and gas industry |
| 71314300 |
Energy-efficiency consultancy services |
Energy and related services |
| 71351200 |
Geological and geophysical consultancy services |
Geological, geophysical and other scientific prospecting services |
| 71351220 |
Geological consultancy services |
Geological, geophysical and other scientific prospecting services |
| 44622000 |
Heat-recovery systems |
Central-heating radiators and boilers and parts |
| 09321000 |
Hot water |
Steam, hot water and associated products |
| 71353100 |
Hydrographic surveying services |
Surface surveying services |
| 09324000 |
Long-distance heating |
Steam, hot water and associated products |
| 72224000 |
Project management consultancy services |
Systems and technical consultancy services |
| 73210000 |
Research consultancy services |
Research and development consultancy services |
| 09322000 |
Steam |
Steam, hot water and associated products |
| 71352000 |
Subsurface surveying services |
Engineering-related scientific and technical services |
| 79311000 |
Survey services |
Market research services |
| 71355000 |
Surveying services |
Engineering-related scientific and technical services |
| 38290000 |
Surveying, hydrographic, oceanographic and hydrological instruments and appliances |
Geological and geophysical instruments |
| 71600000 |
Technical testing, analysis and consultancy services |
Architectural, construction, engineering and inspection services |