... efficiency and less energy consumption2.The efficiency of self heat preservation is higher than 80% ,for single cylinder ... type ,it is 35%.3.Compared with the single cylinder type with same capcity ,the 3 cylinder type ... fuel can be coal ,oil and gas.5.With the heat resisting ,hear wearing alloy steel plates,Its ... .Without the big and small gears,it work with riding wheel.9.The temperature of out air ...