The improvement results from a change in the essential constitution of the soft melting zone when charged with an ore and coke mixture.
获得改善的原因在于混装时软溶层的结构发生了质的变化。
The improvement results from a change in the essential constitution of the soft melting zone when charged with an ore and coke mixture.
获得改善的原因在于混装时软溶层的结构发生了质的变化。
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