 |
| sewer system: 42 phrases in 15 subjects |
| Caspian | 2 |
| Construction | 3 |
| Ecology | 5 |
| Energy industry | 1 |
| Environment | 3 |
| General | 5 |
| Karachaganak | 1 |
| Makarov | 3 |
| Metallurgy | 1 |
| Natural resourses and wildlife conservation | 1 |
| Sakhalin | 6 |
| Technology | 3 |
| Tengiz | 3 |
| Water supply | 2 |
| Weapons of mass destruction | 3 |