 |
| |||
| annulated bit | |||
| ring bit (бура) | |||
| annular bit | |||
| кольцевая коронка: 13 phrases in 5 subjects |
| Geology | 1 |
| Mechanic engineering | 1 |
| Mining | 5 |
| Oil / petroleum | 5 |
| Oil and gas | 1 |
|
| |||
| annulated bit | |||
| ring bit (бура) | |||
| annular bit | |||
| кольцевая коронка: 13 phrases in 5 subjects |
| Geology | 1 |
| Mechanic engineering | 1 |
| Mining | 5 |
| Oil / petroleum | 5 |
| Oil and gas | 1 |