| |||
| mines profondes | |||
| |||
| exploitation souterraine; extraction souterraine | |||
| extraction en galerie | |||
|
deep mines : 2 phrases in 2 subjects |
| Environment | 1 |
| Mineral products | 1 |
| |||
| mines profondes | |||
| |||
| exploitation souterraine; extraction souterraine | |||
| extraction en galerie | |||
|
deep mines : 2 phrases in 2 subjects |
| Environment | 1 |
| Mineral products | 1 |