development flight
| test
| development flight | |
| avia. | 研制飞行 |
| test | |
| gen. | 测 |
| archit. | 试 验; 测验; 检査; 准则; 试验品; 试验方法 |
| auto. | 检 验 |
| hydroel.st. | 检定 |
| |||
| 研制飞行 | |||
|
development flight : 12 phrases in 3 subjects |
| Aviation | 7 |
| Electronics | 1 |
| Space | 4 |