 |
surface casing
| vent
- only individual words found
| surface casing | |
| dril. | Ankerrohr; Standrohr |
| vent | |
| gen. | Entlüftung; Luftloch; Öffnung; Schlitz |
| |||
| Ankerrohr n; Standrohr n | |||
|
surface casing : 2 phrases in 2 subjects |
| Mining | 1 |
| Technology | 1 |