 |
| |||
| Faulgas n; Klärgas n | |||
| gas di depurazione: 20 phrases in 8 subjects |
| Chemistry | 1 |
| Coal | 2 |
| Earth sciences | 1 |
| Ecology | 4 |
| Environment | 4 |
| General | 4 |
| Metallurgy | 1 |
| Transport | 3 |
|
| |||
| Faulgas n; Klärgas n | |||
| gas di depurazione: 20 phrases in 8 subjects |
| Chemistry | 1 |
| Coal | 2 |
| Earth sciences | 1 |
| Ecology | 4 |
| Environment | 4 |
| General | 4 |
| Metallurgy | 1 |
| Transport | 3 |