浇水壶使用一段时间后，壶壁就会结上一层黄灰色或白色的沉淀物质，这就是我们常说的水垢，这对人体危害很大。天然水中常含有硫酸钙硅酸盐等杂质，在烧开水加热后，所含杂质的结构改变。成为难溶于水的沉淀物面积聚下来，这就是水垢。水垢是一种复杂的物质，除盐类外，还含有 After using the watering pot for a period of time, the wall of the pot will be covered with a layer of yellowish gray or white sediment, which is what we often say scale, which is very harmful to the human body. Natural water often contain impurities such as calcium sulfate silicate, boiled water heating, the impurities contained in the structure change. Become insoluble in water sediment surface area down, this is scale. Scale is a complex substance, in addition to salt, but also contains