 |
| gas- air mixture: 15 phrases in 10 subjects |
| Construction | 3 |
| Ecology | 3 |
| Energy industry | 1 |
| Karachaganak | 1 |
| Mathematics | 1 |
| Natural resourses and wildlife conservation | 1 |
| Oil / petroleum | 1 |
| Oil and gas | 1 |
| Oilfields | 1 |
| Technology | 2 |
|
| gas- air mixture: 15 phrases in 10 subjects |
| Construction | 3 |
| Ecology | 3 |
| Energy industry | 1 |
| Karachaganak | 1 |
| Mathematics | 1 |
| Natural resourses and wildlife conservation | 1 |
| Oil / petroleum | 1 |
| Oil and gas | 1 |
| Oilfields | 1 |
| Technology | 2 |