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预研试制 | |||
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前期工程 |
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 |