 |
| reservoir capacity: 30 phrases in 15 subjects |
| Construction | 3 |
| Economy | 1 |
| Electronics | 4 |
| Energy system | 1 |
| Geography | 2 |
| Hydrology | 1 |
| Makarov | 2 |
| Natural resourses and wildlife conservation | 2 |
| Oil / petroleum | 2 |
| Oil and gas | 2 |
| Oil and gas technology | 1 |
| Oilfields | 1 |
| Production | 1 |
| Technology | 3 |
| Water resources | 4 |