 |
| fluvial: 91 phrases in 26 subjects |
| Agrochemistry | 3 |
| Biology | 1 |
| Construction | 4 |
| Diplomacy | 1 |
| Ecology | 11 |
| Economy | 1 |
| Electronics | 2 |
| Environment | 1 |
| General | 3 |
| Geography | 7 |
| Geology | 5 |
| Hydraulic engineering | 3 |
| Hydrology | 8 |
| Law | 2 |
| Makarov | 6 |
| Maritime law & Law of the Sea | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Oil and gas | 1 |
| Oilfields | 1 |
| Sakhalin | 1 |
| Seismology | 1 |
| Soil science | 1 |
| Technology | 8 |
| Trade unions | 6 |
| Water resources | 11 |