Composite samples are used mainly in evaluating the efficiency of waste-water treatment facilities. 混合样主要用来评价废水处理装置的效率。
The melting equipments of secondary and treatment devices of aluminium ash at home and abroad are introduced and analysed. 摘要对国内外再生金属的熔炼设备及铝灰渣处理装置进行了介绍和分析。
