冶炼硬线钢时,降低Al2O3夹杂物的措施主要从以下几点做起()A、原料B、耐火材料C、档渣D、精炼时间E、精炼温度

冶炼硬线钢时,降低Al2O3夹杂物的措施主要从以下几点做起()

  • A、原料
  • B、耐火材料
  • C、档渣
  • D、精炼时间
  • E、精炼温度

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