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| 岩石铺砌 | |||
| 块石护岸; 石料护岸 | |||
| 抛石护坡; 抛石护岸 | |||
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rock revetment : 8 phrases in 3 subjects |
| Bridge construction | 2 |
| Hydrology | 1 |
| Technology | 5 |
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