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| 联合开发 | |||
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unit development : 30 phrases in 12 subjects |
| Aviation | 5 |
| Chemistry | 1 |
| Earth sciences | 1 |
| Electric machinery | 1 |
| Electronics | 2 |
| General | 2 |
| Management | 1 |
| Name of organization | 4 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 4 |
| United Nations | 6 |
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