... is higher than 80% ,for single cylinder type ,it is 35%.3.Compared with the single cylinder type with same capcity ,the 3 cylinder ... .4.The fuel can be coal ,oil and gas.5.With the heat resisting ,hear wearing alloy steel plates,Its life ... stop .8.Without the big and small gears,it work with riding wheel.9.The temperature of out air is low ,and ...