| |||
| techniques de séparation | |||
|
separation techniques : 6 phrases in 5 subjects |
| Coal | 1 |
| Earth sciences | 1 |
| Natural resourses and wildlife conservation | 2 |
| Telecommunications | 1 |
| Transport | 1 |
| |||
| techniques de séparation | |||
|
separation techniques : 6 phrases in 5 subjects |
| Coal | 1 |
| Earth sciences | 1 |
| Natural resourses and wildlife conservation | 2 |
| Telecommunications | 1 |
| Transport | 1 |