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| 黑色铁类金属 | |||
| 铁金属 | |||
| 类铁铁(类)，黑色金属; 铁合金 | |||
| 黑色铁类金属 | |||
| 铁类金属; 黑色金属 (【技】通常指铁、铬、锰，亦包括钢及其他以铁为主的合金。); 铁基合金 | |||
| 铁类金属黑色金属 | |||
| 铁类金属 | |||
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ferrous metal : 56 phrases in 12 subjects |
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| Metallurgy | 22 |
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| Technology | 18 |
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