| |||
| зубья долота с полусферической рабочей поверхностью | |||
|
bit teeth with hemispherical working surface : 2 phrases in 2 subjects |
| Oil and gas technology | 1 |
| Oilfields | 1 |
| |||
| зубья долота с полусферической рабочей поверхностью | |||
|
bit teeth with hemispherical working surface : 2 phrases in 2 subjects |
| Oil and gas technology | 1 |
| Oilfields | 1 |