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| 研究、设计和开发 | |||
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research, engineering and development : 22 phrases in 8 subjects |
| Air defense | 1 |
| Aviation | 5 |
| Business | 1 |
| Earth sciences | 4 |
| Electronics | 4 |
| General | 3 |
| Space | 3 |
| United States | 1 |
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