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研究与 工 程 : 59 phrases in 15 subjects |
| Air defense | 1 |
| Automobiles | 2 |
| Aviation | 12 |
| Business | 1 |
| Commerce | 1 |
| Company name | 1 |
| Earth sciences | 13 |
| Economy | 1 |
| Electronics | 12 |
| General | 8 |
| Geophysics | 1 |
| Navigation | 1 |
| Shipbuilding | 1 |
| Space | 3 |
| United States | 1 |
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