engineering flight test
| work authorization
| engineering flight test | |
| avia. | 工程飞行试验 |
| work authorization | |
| el. | 工作授权; 工作特许 |
| |||
| 工程飞行试验 | |||
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engineering flight test : 9 phrases in 4 subjects |
| Aviation | 6 |
| Electronics | 1 |
| General | 1 |
| Space | 1 |