| |||
| filtre en tissu | |||
| filtre à tissu | |||
|
fabric filter : 8 phrases in 4 subjects |
| Coal | 1 |
| Environment | 2 |
| Natural resourses and wildlife conservation | 4 |
| Textile industry | 1 |
| |||
| filtre en tissu | |||
| filtre à tissu | |||
|
fabric filter : 8 phrases in 4 subjects |
| Coal | 1 |
| Environment | 2 |
| Natural resourses and wildlife conservation | 4 |
| Textile industry | 1 |