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| 渗透深度 | |||
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percolation deep : 21 phrases in 8 subjects |
| Agriculture | 1 |
| Desert science | 2 |
| Earth sciences | 2 |
| Engineering geology | 1 |
| Hydraulics | 1 |
| Hydroelectric power stations | 1 |
| Technology | 12 |
| Water resources | 1 |
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