| |||
| système d'échantillonnage | |||
|
sampling system : 9 phrases in 5 subjects |
| Coal | 1 |
| Computer numerical control | 1 |
| General | 1 |
| Natural resourses and wildlife conservation | 2 |
| Transport | 4 |
| |||
| système d'échantillonnage | |||
|
sampling system : 9 phrases in 5 subjects |
| Coal | 1 |
| Computer numerical control | 1 |
| General | 1 |
| Natural resourses and wildlife conservation | 2 |
| Transport | 4 |