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| sand dump; sand pit; sand pool | |||
| 砂场: 27 phrases in 8 subjects |
| Construction | 1 |
| Desert science | 1 |
| Ecology | 1 |
| Engineering geology | 1 |
| General | 1 |
| Hydroelectric power stations | 4 |
| Metallurgy | 1 |
| Technology | 17 |
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