supply ventilation : 29 phrases in 11 subjects |
Construction | 8 |
Firefighting and fire-control systems | 1 |
General | 4 |
Measuring instruments | 2 |
Nautical | 2 |
Non-governmental organizations | 1 |
Oil / petroleum | 1 |
Oil and gas | 1 |
Shipbuilding | 4 |
Ventilation | 4 |
Weapons of mass destruction | 1 |