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| 双联炼钢法; 二联炼钢法; 双联炼钢法; 二联炼钢法; 混合法 | |||
| 二联法; 双炼法; 双联法 | |||
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duplex process : 8 phrases in 2 subjects |
| Metallurgy | 5 |
| Technology | 3 |
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