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| three phase arc furnace | |||
| Heroult electric arc furnace; three-phase arc furnace; Heroult electric arc furnace; three-phase electric arc furnace | |||
| three-phase electric-arc furnace | |||
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三相电弧炉 : 4 phrases in 2 subjects |
| Metallurgy | 3 |
| Technology | 1 |
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