| |||
| четырёхлопастное долото | |||
|
four- blade bit : 5 phrases in 3 subjects |
| Oil / petroleum | 2 |
| Oil and gas technology | 2 |
| Oilfields | 1 |
| |||
| четырёхлопастное долото | |||
|
four- blade bit : 5 phrases in 3 subjects |
| Oil / petroleum | 2 |
| Oil and gas technology | 2 |
| Oilfields | 1 |