27010 | Energy and heat transfer engineering in general |
27020 | Internal combustion engines |
27040 | Gas and steam turbines. Steam engines |
27060 | Burners. Boilers |
27070 | Fuel cells |
27075 | Hydrogen technologies |
27080 | Heat pumps |
27100 | Power stations in general |
27120 | Nuclear energy engineering |
27140 | Hydraulic energy engineering |
27160 | Solar energy engineering |
27180 | Wind turbine energy systems |
27190 | Biological sources and alternative sources of energy |
27200 | Refrigerating technology |
27220 | Heat recovery. Thermal insulation |