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| 氧气顶吹 | |||
| 顶部吹氧法炼钢 | |||
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| 氧气顶吹; 纯氧顶吹; 顶部吹氧 | |||
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| 氧气顶吹; 纯氧顶吹; 顶部吹氧 | |||
| oxygen top blowing: 13 phrases in 2 subjects |
| Metallurgy | 12 |
| Technology | 1 |
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