 |
| |||
| experimental flight; test flight | |||
| air-tested | |||
| trial flight | |||
| |||
| familiarization flight | |||
| 试验飞行: 360 phrases in 12 subjects |
| Air defense | 3 |
| Aviation | 150 |
| Business | 5 |
| Earth sciences | 1 |
| Electronics | 19 |
| General | 14 |
| Military | 1 |
| Missiles | 2 |
| Skydiving | 1 |
| Space | 153 |
| Technology | 3 |
| United States | 8 |