 |
| |||
| office of aerospace research | |||
| hacienda (美国空军) | |||
| hacienda (美国空军，口语) | |||
| 航空航 天 研究局: 14 phrases in 4 subjects |
| Aviation | 1 |
| Electronics | 3 |
| Space | 3 |
| United States | 7 |
|
| |||
| office of aerospace research | |||
| hacienda (美国空军) | |||
| hacienda (美国空军，口语) | |||
| 航空航 天 研究局: 14 phrases in 4 subjects |
| Aviation | 1 |
| Electronics | 3 |
| Space | 3 |
| United States | 7 |