There are high altitude and low altitude, and the air volume 10000. Besides air volume, what other functions are needed? . The present lampblack purifier equipment is not necessarily local. Many manufacturers of fume purifiers have sales in all parts of the country, and all provinces have sales points. After-sales service is not bad for local fume purifier manufacturers, such as Jinjie. All provinces have direct sales outlets to develop and produce low-altitude fume purifiers for catering.