... material ,chemical ,metallurgy ,cast industries and so on.It can dry material such as sand ,slag,clay,fly ... is higher than 80% ,for single cylinder type ,it is 35%.3.Compared with the single cylinder type ... the 3 cylinder type only cover the 50% ground.It will save the 50% of building cost,60% power ... without stop .8.Without the big and small gears,it work with riding wheel.9.The temperature of out air ...