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| 安全开采量 | |||
| 可靠产量 | |||
| 可靠产水量; 保证水量; 保证出产量; 安全出水率; 安全出水量; 安全产水量; 安全产量 | |||
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safe yield : 8 phrases in 5 subjects |
| Desert science | 1 |
| Engineering geology | 3 |
| Hydroelectric power stations | 1 |
| Technology | 1 |
| Water resources | 2 |
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