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| 流域规划 (开发工程) | |||
| 流域规划; 流域开发工程 | |||
| 流域开发项目 | |||
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valley project : 9 phrases in 5 subjects |
| Drilling | 1 |
| Earth sciences | 3 |
| Electronics | 1 |
| Hydroelectric power stations | 2 |
| Technology | 2 |
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