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| 桶内加料; 罐内加料; 包内添加 | |||
| 桶内添加剂 | |||
| 炉前料; 包内添加剂 | |||
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| 钢包添加剂 | |||
| ladle addition: 7 phrases in 1 subject |
| Metallurgy | 7 |
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