 |
| |||
| concrete lining; concrete masonry; concrete walling (прямоугольного ствола шахты) | |||
| concrete support | |||
| бетонная крепь: 19 phrases in 6 subjects |
| Astronautics | 2 |
| Construction | 1 |
| Geology | 1 |
| Gold mining | 1 |
| Mining | 11 |
| Technology | 3 |
|
| |||
| concrete lining; concrete masonry; concrete walling (прямоугольного ствола шахты) | |||
| concrete support | |||
| бетонная крепь: 19 phrases in 6 subjects |
| Astronautics | 2 |
| Construction | 1 |
| Geology | 1 |
| Gold mining | 1 |
| Mining | 11 |
| Technology | 3 |