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| 二级金属 (指从金属废料或合金中提炼出来的金属) | |||
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| 再用重熔金属 | |||
| 再生金属; 再生〔重熔〕金属 | |||
| 回炉金属; 次生金属; 重熔金属; 再用金属 | |||
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secondary metals : 4 phrases in 2 subjects |
| Metallurgy | 3 |
| Technology | 1 |
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