根据RH精炼处理对过程控制的要求，建立了RH温度与合金最小成本模型。
In line with the requirements for the process control in the RH refining a RH temperature model and an alloy minimum cost model have been developed.
冶金硅是生产有机硅和电子用硅的重要原材料，需精炼处理以降低其中的杂质。
Metallurgical grade silicon is raw materials for organic and electronic USES. The impurities should be reduced through refining treatment, the method of oxidizing is priority now.
额，直接污染源是那些从工厂、精炼厂、污水处理厂排放出来的污染，是吗？
Well, direct ones are pollution directly from factories, refineries, waste treatment plants etc, aren't they?
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