 |
| |||
| Nutzgas n; Aktivgas m; Arbeitsgas m | |||
| working gas: 8 phrases in 4 subjects |
| Chemistry | 1 |
| General | 5 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |
|
| |||
| Nutzgas n; Aktivgas m; Arbeitsgas m | |||
| working gas: 8 phrases in 4 subjects |
| Chemistry | 1 |
| General | 5 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |