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| 铺砂〔砂垫〕层 | |||
| 铺砂层; 砂垫层 | |||
| 砂垫层; 砂床; 砂质河床 | |||
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sand bedding : 13 phrases in 5 subjects |
| Bridge construction | 1 |
| Engineering geology | 3 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Technology | 6 |
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