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| главная выводящая воздух выработка | |||
| главная исходящая вентиляционная струя | |||
| главная нисходящая вентиляционная труба | |||
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main return : 26 phrases in 11 subjects |
| Construction | 7 |
| Electricity | 1 |
| Firefighting and fire-control systems | 1 |
| Heating | 1 |
| Information technology | 1 |
| Makarov | 4 |
| Metallurgy | 1 |
| Nautical | 2 |
| Shipbuilding | 1 |
| Technology | 5 |
| Transport | 2 |