After treatment of yarns or cloth, the sodium hydroxide is removed by several washes under tension.
纱线或织物经过处理之后，要在张力状态下经过几次水洗以除去氢氧化钠。
On the basis of studying the mechanism of sewage scaling and its softening treatment, the technique for water quality soft process with sodium hydroxide precipitation method is determined.
在污水结垢机理和软化处理研究的基础上，确定了氢氧化钠沉淀法进行水质软化处理的工艺。
Treatment of 1, 3-diketones containing benzoyloxy group in 1% aqueous sodium hydroxide can afford directly the corresponding ring-A hydroxylated flavone.
用1%的氢氧化钠水溶液处理带有芳酰氧基的1,3 -丙二酮衍生物可以直接得到A环带有羟基的黄酮化合物。
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