 |
| |||
| curf; kerf (при колонковом бурении) | |||
| ring-shaped bottom (Yeldar Azanbayev) | |||
| кольцевой забой: 14 phrases in 5 subjects |
| Mining | 4 |
| Oil / petroleum | 4 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 4 |
|
| |||
| curf; kerf (при колонковом бурении) | |||
| ring-shaped bottom (Yeldar Azanbayev) | |||
| кольцевой забой: 14 phrases in 5 subjects |
| Mining | 4 |
| Oil / petroleum | 4 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 4 |