 |
| ventilation exhaust: 68 phrases in 22 subjects |
| Architecture | 1 |
| Astronautics | 1 |
| Automated equipment | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Cement | 1 |
| Construction | 15 |
| Energy industry | 1 |
| Firefighting and fire-control systems | 6 |
| General | 5 |
| Makarov | 1 |
| Mining | 7 |
| Nautical | 5 |
| Nuclear and fusion power | 1 |
| Nuclear physics | 1 |
| Sakhalin | 2 |
| Shipbuilding | 3 |
| Submarines | 1 |
| Technology | 6 |
| Transport | 1 |
| Ventilation | 2 |
| Weapons of mass destruction | 5 |