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| 二次精炼技术 (With the advent of secondary refining techniques and the drive toward steels of significantly improved properties and quality, the tundish has become a tertiary refiner. 随着二次精炼技术的出现和大幅度提高钢的性能和质量的推动，中间包已变成了三次精炼器。) | |||
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secondary refining technique : 2 phrases in 1 subject |
| Metallurgy | 2 |