 |
| |||
| опора бурового долота | |||
|
drilling bit structure : 7 phrases in 3 subjects |
| Oil / petroleum | 4 |
| Oil and gas technology | 1 |
| Technology | 2 |
|
| |||
| опора бурового долота | |||
|
drilling bit structure : 7 phrases in 3 subjects |
| Oil / petroleum | 4 |
| Oil and gas technology | 1 |
| Technology | 2 |