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| 前期工程 | |||
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| 预研试制 | |||
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advanced engineering : 28 phrases in 13 subjects |
| Automobiles | 7 |
| Aviation | 5 |
| Chemistry | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 1 |
| Navigation | 1 |
| Nuclear physics | 1 |
| Oil processing plants | 1 |
| Shipbuilding | 2 |
| Space | 4 |
| Technology | 2 |
| United States | 1 |