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| 抛石防护 | |||
| 抛石〔乱石〕护坡 (of slope) | |||
| 抛石护坡; 乱石保护边坡; 抛石防護 | |||
| 乱石保护 (边坡) | |||
| riprap protection: 6 phrases in 3 subjects |
| Bridge construction | 2 |
| Hydroelectric power stations | 2 |
| Technology | 2 |
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