| |||
| корпусное долото | |||
| |||
| коронка с внутренней резьбой; корпусное долото | |||
|
box type bit : 6 phrases in 4 subjects |
| Oil / petroleum | 1 |
| Oil and gas | 2 |
| Oil and gas technology | 1 |
| Oilfields | 2 |
| |||
| корпусное долото | |||
| |||
| коронка с внутренней резьбой; корпусное долото | |||
|
box type bit : 6 phrases in 4 subjects |
| Oil / petroleum | 1 |
| Oil and gas | 2 |
| Oil and gas technology | 1 |
| Oilfields | 2 |