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| 下游坡度 | |||
| 下游坡; 下游坡背水坡; 背水坡; 下游边坡 | |||
| 下游面坡度; 坝的背水坡; 背水面坡度; 坝的背水坡 | |||
| downstream slope: 5 phrases in 2 subjects |
| Hydroelectric power stations | 4 |
| Technology | 1 |
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