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| 电弧炉内气氛 | |||
| 电弧炉内气氛 | |||
| 电弧气氛; 电弧炉内气氛 | |||
| arc atmosphere: 5 phrases in 3 subjects |
| Electric machinery | 1 |
| Metallurgy | 3 |
| Technology | 1 |
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