| |||
| корпусное шарошечное долото | |||
|
box-type rolling bit : 4 phrases in 3 subjects |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 2 |
| |||
| корпусное шарошечное долото | |||
|
box-type rolling bit : 4 phrases in 3 subjects |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Oilfields | 2 |