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What is the role of the front filter? Effect Analysis of front filterThe front filter is usually installed after the water inlet pipe water meter, which is the first coarse filtration equipment for the whole house water. it can filter large particles such as sediment and rust in the tap water. the front filter is a secondary pollution star, it is a reliable impurity filtration device. It is usually a 'T' type structure. The 'one horizontal' position above is the inlet and outlet respectively at the left and right ends. The 'one vertical' position below is the cylindrical filter screen inside the body and the bottom end is the sewage outlet, which is opened and closed by a valve.The front filter is generally installed at the front end of the pipeline, so it is named after the word 'front'; and 'filtering' refers to the basic principle of such equipment. According to the working principle, it is divided into: laminated filter, flush filter, siphon filter and backwashing filter. the backwashing fr

Chemistry knowledge points summary. 1. chemistry is the basic science for studying the composition, structure, nature and change law of substances.2. China's working people's Shang Dynasty will make bronze ware,During the Spring and Autumn period, ironmaking and steelmaking will occur.Green chemistry-----(2) compare the temperature of each flame layer: Put a matchstick into the flame.Phenomenon: carbon at both ends first;(3) inspection product H2O: cover the flame with a dry and cold beaker,CO2: remove the beaker,Pour clear lime water,Oscillation,(4) after extinction: there is white smoke (for paraffin vapor ),Light white smoke,Candles rekindle.Explain the combustion of paraffin vapor.Conclusion