 |
| |||
| four roller bit; four- roller bit; four-roller bit | |||
| четырёхшарошечное долото: 9 phrases in 4 subjects |
| Oil / petroleum | 5 |
| Oil and gas | 1 |
| Oil and gas technology | 2 |
| Oilfields | 1 |
|
| |||
| four roller bit; four- roller bit; four-roller bit | |||
| четырёхшарошечное долото: 9 phrases in 4 subjects |
| Oil / petroleum | 5 |
| Oil and gas | 1 |
| Oil and gas technology | 2 |
| Oilfields | 1 |