 |
| |||
| shaft sinking | |||
| проходка шахты: 15 phrases in 6 subjects |
| Astronautics | 3 |
| Construction | 3 |
| General | 1 |
| Geology | 1 |
| Mining | 6 |
| Technology | 1 |
|
| |||
| shaft sinking | |||
| проходка шахты: 15 phrases in 6 subjects |
| Astronautics | 3 |
| Construction | 3 |
| General | 1 |
| Geology | 1 |
| Mining | 6 |
| Technology | 1 |