The contents of trace, poisonous and harmful heavy metallic elements in stable bound-state sulfide in soils can be calculated by systematic cluster analysis.
采用系统聚类分析方法，能定量地分析稳定的硫化物结合态微量有毒有害重金属元素的数量。
The long nozzle can effectively control non-metallic inclusion in molten steel, accurately control and regulate the content of trace elements in molten steel and produce fine oxides to disperse steel;
使用该水口可有效控制钢液 中非金属夹杂物、精确调控钢液中的微量元素含量、生产细小氧化物弥 散钢。
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