 |
| |||
| oxygen-enriched air | |||
| обогащённый воздух кислородом: 10 phrases in 6 subjects |
| Astronautics | 1 |
| Ecology | 1 |
| Gas processing plants | 1 |
| Makarov | 2 |
| Metallurgy | 3 |
| Thermal engineering | 2 |
|
| |||
| oxygen-enriched air | |||
| обогащённый воздух кислородом: 10 phrases in 6 subjects |
| Astronautics | 1 |
| Ecology | 1 |
| Gas processing plants | 1 |
| Makarov | 2 |
| Metallurgy | 3 |
| Thermal engineering | 2 |