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| 勘探开发; 探索性研究; 探究性研究; 预研 | |||
| 应用研究 | |||
| 探索性研制 | |||
| 探索研究; 探索性开发; 探索性发展 | |||
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exploratory development : 11 phrases in 4 subjects |
| Aviation | 1 |
| Earth sciences | 4 |
| Electronics | 3 |
| Space | 3 |
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