 |
| |||
| room mining | |||
|
exploitation par chambres : 21 phrases in 6 subjects |
| Coal | 3 |
| Construction | 2 |
| General | 2 |
| Life sciences | 3 |
| Metallurgy | 10 |
| Natural resourses and wildlife conservation | 1 |
|
| |||
| room mining | |||
|
exploitation par chambres : 21 phrases in 6 subjects |
| Coal | 3 |
| Construction | 2 |
| General | 2 |
| Life sciences | 3 |
| Metallurgy | 10 |
| Natural resourses and wildlife conservation | 1 |