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| 人工堆筑的抛石护坡 | |||
| 手工堆筑的抛石护坡 | |||
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| 人工堆筑的抛石护坡; 人工抛石; 手铺片石 | |||
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hand placed riprap : 2 phrases in 2 subjects |
| Bridge construction | 1 |
| Technology | 1 |
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