 |
| |||
| газово-пылевое вещество | |||
| gas- dust mixture: 7 phrases in 4 subjects |
| Ecology | 2 |
| Firefighting and fire-control systems | 1 |
| Mining | 2 |
| Natural resourses and wildlife conservation | 2 |
|
| |||
| газово-пылевое вещество | |||
| gas- dust mixture: 7 phrases in 4 subjects |
| Ecology | 2 |
| Firefighting and fire-control systems | 1 |
| Mining | 2 |
| Natural resourses and wildlife conservation | 2 |