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| 氧气顶吹转炉; BOF 转炉 (A single BOF furnace can produce over three million tonnes of steel per year, which means moving over six million tonnes of metal in and out. 一座氧气顶吹转炉一年可以生产300多万吨钢，这就是说一年进出转炉的金属量要超过600 万 t。) | |||
| BOF furnace: 3 phrases in 1 subject |
| Metallurgy | 3 |
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