 |
| |||
| Reingas m | |||
| sauberes Gas | |||
| clean gas: 33 phrases in 9 subjects |
| Chemistry | 2 |
| Coal | 5 |
| Earth sciences | 4 |
| Ecology | 4 |
| Environment | 3 |
| General | 6 |
| Materials science | 1 |
| Metallurgy | 2 |
| Natural resourses and wildlife conservation | 6 |
|
| |||
| Reingas m | |||
| sauberes Gas | |||
| clean gas: 33 phrases in 9 subjects |
| Chemistry | 2 |
| Coal | 5 |
| Earth sciences | 4 |
| Ecology | 4 |
| Environment | 3 |
| General | 6 |
| Materials science | 1 |
| Metallurgy | 2 |
| Natural resourses and wildlife conservation | 6 |