 |
| |||
| Bohrabteufen der Schächte | |||
| буровая проходка: 8 phrases in 6 subjects |
| Construction | 1 |
| Geology | 1 |
| Mining | 3 |
| Oil / petroleum | 1 |
| Technology | 1 |
| Water supply | 1 |
|
| |||
| Bohrabteufen der Schächte | |||
| буровая проходка: 8 phrases in 6 subjects |
| Construction | 1 |
| Geology | 1 |
| Mining | 3 |
| Oil / petroleum | 1 |
| Technology | 1 |
| Water supply | 1 |