| |||
| Tiefbau m | |||
| Abbau unter Tage | |||
|
exploitation souterraine : 14 phrases in 6 subjects |
| Coal | 6 |
| Construction | 2 |
| Environment | 1 |
| Finances | 1 |
| Life sciences | 1 |
| Metallurgy | 3 |
| |||
| Tiefbau m | |||
| Abbau unter Tage | |||
|
exploitation souterraine : 14 phrases in 6 subjects |
| Coal | 6 |
| Construction | 2 |
| Environment | 1 |
| Finances | 1 |
| Life sciences | 1 |
| Metallurgy | 3 |