蒸馏是把水煮沸然后冷凝除去不溶性杂质；反渗透是使用膜分离工艺达到同样的目的。
Distillation is achieved by boiling and then recondensing water to remove insoluble contaminants; reverse osmosis uses a membrane separation process to accomplish the same purpose.
钢材表面应无可见的油脂和污物，并且没有附着不牢的氧化皮、铁锈和油漆涂层及其它杂质（水溶性盐和焊接残渣）。
Steel surface should be no visible grease and dirt, and there is no attachment not firm scale, rust, paint and other impurities (water soluble salt and welding residue).
洗涤过滤的主要原理是利用偏钛酸的水不溶性与杂质离子的水溶性进行液固分离。
The main principle of washing and filtering is to use the insolubility of the metatitanic acid in water and the solubility of the impurity ions in water to separate the liquid and solid.
注意：冷却水不得含有悬浮物、矿物质、金属杂质，不溶性和腐蚀性物质。
Note: the water for coolant shall be demineralized water without suspended matter, impure matter, unsolvable matter and corrosiveness matter.
注意：冷却水不得含有悬浮物、矿物质、金属杂质，不溶性和腐蚀性物质。
Note: the water for coolant shall be demineralized water without suspended matter, impure matter, unsolvable matter and corrosiveness matter.
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