| |||
| общие правила взрывобезопасности (MichaelBurov); ОПВ (MichaelBurov) | |||
|
General Explosive Safety Rules : 4 phrases in 2 subjects |
| Oil and gas | 3 |
| Security systems | 1 |
| |||
| общие правила взрывобезопасности (MichaelBurov); ОПВ (MichaelBurov) | |||
|
General Explosive Safety Rules : 4 phrases in 2 subjects |
| Oil and gas | 3 |
| Security systems | 1 |