 |
| collecteur de poussières: 7 phrases in 4 subjects |
| Construction | 1 |
| Mining | 1 |
| Natural resourses and wildlife conservation | 3 |
| Nuclear physics | 2 |
|
| collecteur de poussières: 7 phrases in 4 subjects |
| Construction | 1 |
| Mining | 1 |
| Natural resourses and wildlife conservation | 3 |
| Nuclear physics | 2 |