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What is the central water purification front filter? Large particles can only be solved by the front (20-40 micron) contaminants,Such as sediment, colloid, some red worms, etc.The filtering accuracy is not high,It is not possible to improve the taste of water and remove harmful substances such as bacterial viruses.The advantage is that the service life is long (it can be washed regularly) and the price is cheap;It can protect the filter element for the water purifier installed in the back,Extend the life of the water purifier filter element.Therefore, it is generally used as a water purifier.If you have a high turbidity of your tap water,This filter can effectively reduce pollutants,If the safety of course to install water purifier,Not just the front.The two complement each other, not substitute.Generally refers to the coarse filtering of the first level.The front is dedicated to filtering impurities of large particles such as sediment,The effect is relatively primary.The central water purifier mainly filter
What kind of medical devices do disposable masks belong? Article 4 The State shall implement classified management of medical devices according to the degree of risk.The first is the low level of risk,Routine management can ensure safe and effective medical devices.The second category is moderate risk,Management needs to be strictly controlled to ensure its safe and effective medical devices.The third category is high risk,Special measures need to be taken to strictly control management to ensure their safe and effective medical devices.1.Product Introduction: size 17.5cmx9.5 cm,50/box,2000/box,Disposable masks are divided into disposable two-layer masks, disposable non-woven masks, disposable three-layer masks and disposable activated carbon masks.2.Disposable three-layer mask is made of two-layer non-woven fabric and filter paper;A disposable three-layer mask is composed of two layers of fiber non-woven fabrics that are professionally used for medical hygiene. in the middle, a layer of filter and
