Does the front water purifier need to replace the filter element? what principle does it work on? The front filter is the same as the filter principle of the water purifier. it is used to filter impurities and particles with a small aperture filter. The aperture of the front filter is larger than that of the ultra-filtration water purifier pure water machine, which is used to intercept large impurities and particles like sand stone. The front filter can be replaced without changing the filter element, but it needs to be cleaned regularly every year with a toothbrush, and the replacement period is about 5-10 years.
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What kind of mask does the doctor bring? Try a gas mask!Respiratory organ protection equipment that only protects respiratory organs from harmful substances.It is mainly used in operating environments containing low concentrations of harmful gases and vapours.Only the absorbent or suction agent is installed in the filter box.Some filter boxes are also equipped with filter layers,Anti-aerosol at the same time.Some military gas masks,Mainly made of active carbon cloth,Or use water-resistant oil-resistant fabric as the outer layer,The glass fiber filter material is the inner layer,Polyurethane foam soaked in activated carbon is the bottom layer,Temporary protection can be provided in the event of a gas attack.The gas mask is a bionic work, inspired by the wild boar on the battlefield after another war.Chemical weapons were used at the time,But the wild boar was not found after the war,Therefore, a gas mask and a gas mask were created to imitate the shape of the boar's nose.Anti-virus masks can be d
