| |||
| кислородный градиент | |||
|
oxygen gradient : 7 phrases in 4 subjects |
| Aviation | 1 |
| Makarov | 1 |
| Medical | 4 |
| Occupational health & safety | 1 |
| |||
| кислородный градиент | |||
|
oxygen gradient : 7 phrases in 4 subjects |
| Aviation | 1 |
| Makarov | 1 |
| Medical | 4 |
| Occupational health & safety | 1 |