 |
| water conditioning: 39 phrases in 20 subjects |
| Astronautics | 1 |
| Construction | 1 |
| Ecology | 2 |
| Electronics | 1 |
| Energy industry | 5 |
| General | 2 |
| Makarov | 3 |
| Melioration | 1 |
| Metallurgy | 1 |
| Natural resourses and wildlife conservation | 1 |
| Nautical | 1 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 5 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 1 |
| Refrigeration | 6 |
| Sakhalin | 1 |
| Technology | 3 |
| Transport | 1 |