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| clay iron-stone | |||
| blackband; ironstone | |||
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泥铁矿 : 32 phrases in 10 subjects |
| Architecture | 4 |
| Chemistry | 1 |
| Drilling | 2 |
| Electronics | 1 |
| Engineering geology | 1 |
| General | 4 |
| Geology | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 2 |
| Technology | 12 |
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