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| санитарная система | |||
| канализационная система (Yeldar Azanbayev) | |||
| водопровод; сточная система | |||
| sanitary system: 22 phrases in 12 subjects |
| Caspian | 1 |
| Construction | 2 |
| Ecology | 4 |
| Energy industry | 1 |
| General | 2 |
| Law | 1 |
| Natural resourses and wildlife conservation | 1 |
| Nautical | 2 |
| Oil / petroleum | 2 |
| Sakhalin | 1 |
| Technology | 2 |
| Water supply | 3 |