|
threshold light : 11 phrases in 8 subjects |
| Airports and air traffic control | 3 |
| Aviation | 2 |
| General | 1 |
| Makarov | 1 |
| Medical | 1 |
| Medical appliances | 1 |
| Quantum electronics | 1 |
| Technology | 1 |
|
threshold light : 11 phrases in 8 subjects |
| Airports and air traffic control | 3 |
| Aviation | 2 |
| General | 1 |
| Makarov | 1 |
| Medical | 1 |
| Medical appliances | 1 |
| Quantum electronics | 1 |
| Technology | 1 |