 |
| |||
| operations safety | |||
| safe conduct of works (Leonid Dzhepko) | |||
| безопасность ведения работ: 5 phrases in 3 subjects |
| Building structures | 1 |
| Construction | 3 |
| Mining | 1 |
|
| |||
| operations safety | |||
| safe conduct of works (Leonid Dzhepko) | |||
| безопасность ведения работ: 5 phrases in 3 subjects |
| Building structures | 1 |
| Construction | 3 |
| Mining | 1 |