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| 圆筒形炉 | |||
| 圆筒炉 | |||
| 筒式炉 | |||
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| 圆筒炉; 筒式炉 | |||
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cylindrical furnace : 11 phrases in 3 subjects |
| Chemistry | 1 |
| Metallurgy | 6 |
| Technology | 4 |
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