 |
| |||
| step-face bit | |||
| ступенчатая коронка: 14 phrases in 7 subjects |
| Drilling | 1 |
| Geology | 1 |
| Makarov | 1 |
| Mining | 2 |
| Oil / petroleum | 7 |
| Oil and gas technology | 1 |
| Technology | 1 |
|
| |||
| step-face bit | |||
| ступенчатая коронка: 14 phrases in 7 subjects |
| Drilling | 1 |
| Geology | 1 |
| Makarov | 1 |
| Mining | 2 |
| Oil / petroleum | 7 |
| Oil and gas technology | 1 |
| Technology | 1 |