"Oranges born in Huainan are oranges, while those born in Huaibei are oranges. The leaves and disciples are similar, but in fact they have different flavors. So what? Water and soil are different." It explains the differences in different regions.

　　 Pre-filters are more and more widely used in modern life, making the phenomenon of "unacceptable water and soil" quickly become history, and effectively solves many local diseases caused by excessive groundwater harmful minerals.

　　 Pre-filter is also called impurity filter and water filter. Its technical core is the filter mesh in the filter element device, which is a small water treatment equipment that performs pre-filtering treatment for water quality according to the requirements of water use.

　　The function of the pre-filter is to remove floating objects, heavy metals, bacteria, viruses, residual chlorine, sediment, rust, microorganisms, etc. in the water. There are ten types of water treatment methods for water purifiers, namely: softening method, distillation method, boiling method, magnetization method, mineralization method, ozone and ultraviolet sterilization, activated carbon adsorption, RO reverse osmosis membrane, microfiltration and ultrafiltration, Compound.