 |
| |||
| optimum distance | |||
| оптимальное расстояние: 7 phrases in 7 subjects |
| Astronomy | 1 |
| Aviation medicine | 1 |
| Military | 1 |
| Mining | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |
| Telecommunications | 1 |
|
| |||
| optimum distance | |||
| оптимальное расстояние: 7 phrases in 7 subjects |
| Astronomy | 1 |
| Aviation medicine | 1 |
| Military | 1 |
| Mining | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |
| Telecommunications | 1 |