 |
| кислородный прибор: 33 phrases in 15 subjects |
| Aeronautics | 1 |
| Astronautics | 4 |
| Aviation | 6 |
| Aviation medicine | 3 |
| Firefighting and fire-control systems | 1 |
| Geophysics | 1 |
| Medical | 3 |
| Medical appliances | 1 |
| Military | 2 |
| Natural resourses and wildlife conservation | 1 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Technology | 3 |
| Transport | 3 |
| Weapons of mass destruction | 1 |