 |
| |||
| roller bit; roller-type bit | |||
| роликовое долото: 10 phrases in 5 subjects |
| Geology | 1 |
| Oil / petroleum | 5 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 2 |
|
| |||
| roller bit; roller-type bit | |||
| роликовое долото: 10 phrases in 5 subjects |
| Geology | 1 |
| Oil / petroleum | 5 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 2 |