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| 炼铁 (As with the chemical changes that take place in smelting iron, the reactions which produce slag are very complex. 如同炼铁时发生的化学变化一样，造渣过程的化学反应也是很复杂的。) | |||
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smelting iron : 22 phrases in 3 subjects |
| Electronics | 1 |
| Metallurgy | 18 |
| Technology | 3 |
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