 |
| |||
| Rückeverfahren n | |||
|
extraction method : 5 phrases in 4 subjects |
| Coal | 1 |
| Materials science | 1 |
| Natural resourses and wildlife conservation | 1 |
| Transport | 2 |
|
| |||
| Rückeverfahren n | |||
|
extraction method : 5 phrases in 4 subjects |
| Coal | 1 |
| Materials science | 1 |
| Natural resourses and wildlife conservation | 1 |
| Transport | 2 |