|
effective capacity : 21 phrases in 14 subjects |
| Aerohydrodynamics | 1 |
| Agrochemistry | 1 |
| Ecology | 2 |
| Firefighting and fire-control systems | 1 |
| General | 1 |
| Geography | 1 |
| Hydrology | 1 |
| Oil / petroleum | 3 |
| Oil and gas technology | 1 |
| Oilfields | 1 |
| Radioengineering | 1 |
| Solar power | 1 |
| Technology | 5 |
| Water resources | 1 |