 |
| |||
| chopping bit; percussion bit | |||
| долото ударного бурения: 31 phrases in 8 subjects |
| Drilling | 3 |
| Geology | 2 |
| Makarov | 1 |
| Mining | 5 |
| Oil / petroleum | 11 |
| Oil and gas | 2 |
| Oil and gas technology | 3 |
| Technology | 4 |
|
| |||
| chopping bit; percussion bit | |||
| долото ударного бурения: 31 phrases in 8 subjects |
| Drilling | 3 |
| Geology | 2 |
| Makarov | 1 |
| Mining | 5 |
| Oil / petroleum | 11 |
| Oil and gas | 2 |
| Oil and gas technology | 3 |
| Technology | 4 |