Petrochemical wastewater were treated by continuous micro filtration(CMF) and reverse osmose(RO) double membrane technique.
采用连续微滤(CMF)-反渗透(RO)双膜技术深度处理石油
工排放水。
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真题精听 
2016年3月合集 
英语_美洲 Finally nothing remains but the fibers, either gelatinous or made of horn, that constitute your household sponge, which takes on a russet hue and is used for various tasks depending on its degree of elasticity, permeability, or resistance to saturation.
刀用海绵是茶褐色,根据它的弹
、渗
或抵抗浸渍
的程度大小,可以安排它作各种不同的用途。