| |||
| комбинированная колонна | |||
|
collar string : 14 phrases in 4 subjects |
| Drilling | 1 |
| Oil / petroleum | 4 |
| Oil and gas | 4 |
| Oil and gas technology | 5 |
| |||
| комбинированная колонна | |||
|
collar string : 14 phrases in 4 subjects |
| Drilling | 1 |
| Oil / petroleum | 4 |
| Oil and gas | 4 |
| Oil and gas technology | 5 |