| Nace | Description | Number of Company |
|---|---|---|
| 25.21.10 | Manufacture of central heating radiators (except electrical radiators) | 85 |
| 25.21.11 | Manufacture of central heating boilers, (boilers, central heating boilers and other heating systems) (except steam generators and producing hot water boilers) | 86 |
| 25.21.12 | Manufacture of central heating radiators. Casting ones (except electric radiators) | 5 |
| 25.30.01 | Manufacture of condensers for steam generating boilers (steam generators), hot water boilers and parts thereof boilers and steam or other vapor power units | 82 |
| 26.51.90 | Manufacture of search, detection, navigation, aeronautical, and nautical equipment n.e.c. (including hydraulic or pneumatic automatic adjustment or control instruments and milometers, pedometers, stroboscope, manostats, calipers, spectromet | 64 |
| 28.13.01 | Manufacture of air or vacuum pumps, and air or other gas compressors (except hand and foot-operated air pumps and motor vehicles) | 150 |
| 28.13.03 | Manufacture of hand and foot-operated air pumps | 6 |
| 28.14.01 | Manufacture of other taps and valves (including industrial faucets, valves, taps and valves used in plumbing and heating with valves of natural gas) | 591 |
| 28.14.02 | Manufacture of other taps and valves (including industrial faucets, valves, taps and valves used in plumbing and heating with valves of natural gas. except bulk) | 168 |
| 28.21.08 | Manufacture of furnace burners (detonators) | 15 |
