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| pre-sedimentation | |||
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沉积前 : 30 phrases in 9 subjects |
| Agriculture | 1 |
| Desert science | 1 |
| Engineering geology | 1 |
| General | 2 |
| Geology | 1 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 6 |
| Technology | 16 |
| United Nations | 1 |
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