| |||
| exploitation à ciel ouvert | |||
|
open mining : 16 phrases in 7 subjects |
| Agriculture | 3 |
| Coal | 1 |
| Economics | 1 |
| General | 6 |
| Mechanic engineering | 1 |
| Mining | 3 |
| Natural resourses and wildlife conservation | 1 |
| |||
| exploitation à ciel ouvert | |||
|
open mining : 16 phrases in 7 subjects |
| Agriculture | 3 |
| Coal | 1 |
| Economics | 1 |
| General | 6 |
| Mechanic engineering | 1 |
| Mining | 3 |
| Natural resourses and wildlife conservation | 1 |