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| 步进式加热炉 | |||
| 步进式炉 | |||
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| 步进式炉; 步进梁式加热炉 | |||
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| 步进式加热炉 | |||
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| 步进梁式加热炉 | |||
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walking beam furnace : 10 phrases in 3 subjects |
| Metallurgy | 7 |
| Steel production | 1 |
| Technology | 2 |
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