 |
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| наблюдение за воздушным пространством | |||
| наблюдение за воздухом | |||
| авиаразведка | |||
| аэрофоторазведка | |||
| воздушное наблюдение | |||
| air observation: 37 phrases in 11 subjects |
| Aerohydrodynamics | 1 |
| Air defense | 2 |
| Artillery | 4 |
| Construction | 1 |
| General | 1 |
| Intelligence and security services | 3 |
| Military | 20 |
| Physics | 2 |
| Remote sensing | 1 |
| Soviet | 1 |
| Technology | 1 |