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| 碱性氧气转炉钢 | |||
| 碱性氧吹钢; 氧气顶吹转炉钢 | |||
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basic oxygen steel : 7 phrases in 4 subjects |
| Earth sciences | 1 |
| General | 2 |
| Metallurgy | 3 |
| Technology | 1 |
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