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| 铁质黏土 | |||
| 铁泥矿; 赭土 | |||
| 泥质铁矿; 黄黏土; 铁黏土 | |||
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iron clay : 9 phrases in 4 subjects |
| Architecture | 2 |
| Metallurgy | 5 |
| Technology | 1 |
| Water resources | 1 |
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