 |
| |||
| Pfeilerbau m (method); Pfeilerbauverfahren n (method); Kammerpfeilerbau m (method) | |||
| stoop-and-room: 2 phrases in 1 subject |
| Mining | 2 |
|
| |||
| Pfeilerbau m (method); Pfeilerbauverfahren n (method); Kammerpfeilerbau m (method) | |||
| stoop-and-room: 2 phrases in 1 subject |
| Mining | 2 |