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冲 蚀沟 : 26 phrases in 8 subjects |
| Desert science | 1 |
| Earth sciences | 1 |
| Engineering geology | 2 |
| Geology | 1 |
| Hydroelectric power stations | 5 |
| Oil / petroleum | 2 |
| Soil science | 2 |
| Technology | 12 |
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