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| hard pan; sole pan | |||
| hardpan (指由碳酸钙、氧化硅、氧化铁或粒土胶结的硬土层); orterde | |||
| ortstein; duripan | |||
| hardpan | |||
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| orterde | |||
| pan | |||
| 硬磐: 30 phrases in 5 subjects |
| Agriculture | 3 |
| Desert science | 20 |
| Engineering geology | 1 |
| Soil science | 4 |
| Technology | 2 |
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