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| 堤趾排水层; 坡趾排水层 | |||
| 坝趾排水; 坝趾排水体 | |||
| 堤脚排水沟; 坡脚排水设施; 坡脚排水; 坝渠岸堤的背水面坡脚排水; 坝趾排水 (层) | |||
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toe drain : 1 phrase in 1 subject |
| Ecology | 1 |
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