Turn a hole on a cylinder and ask the hole to turn over and then on a plane (the material is stainless steel with a thickness of 1.2). how about the mold Ellipse is a method,If the process allows,

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What is an efficient air filter? Efficient air filters are mainly used to trap 0.Particle dust and various suspended matter below 5um.The air purifier is mainly composed of two parts: the filter element and the housing [1].The basic requirements are high filtration efficiency, low flow resistance and continuous use for a long time to reduce the cost of later consumables.The filter element refers to the air filter,Efficient air filters play a vital role in the air purification industry.Capture 0.