 |
| |||
| разомкнутый цикл воздуха | |||
| open air circuit: 6 phrases in 4 subjects |
| Firefighting and fire-control systems | 2 |
| Occupational health & safety | 1 |
| Security systems | 1 |
| Silicate industry | 2 |
|
| |||
| разомкнутый цикл воздуха | |||
| open air circuit: 6 phrases in 4 subjects |
| Firefighting and fire-control systems | 2 |
| Occupational health & safety | 1 |
| Security systems | 1 |
| Silicate industry | 2 |