 |
| effluent treatment: 58 phrases in 20 subjects |
| Caspian | 1 |
| Ecology | 8 |
| Electronics | 1 |
| Energy industry | 10 |
| Environment | 1 |
| Gas processing plants | 4 |
| General | 1 |
| Makarov | 4 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Oil processing plants | 1 |
| Polymers | 1 |
| Production | 1 |
| Sakhalin | 10 |
| Sakhalin S | 1 |
| Technology | 5 |
| Tengiz | 1 |
| Waste management | 1 |
| Water supply | 3 |
| Weapons of mass destruction | 1 |