923 1.he imported CUMMINSB series engine , large horsepower ,stable ability ,high efficiency ,low oil consumption noise and emissiion 2.large cabin ,adjustable seat ,air conditioner and advanced guiding control system .the imported hydraulic parts ,negative flow &eletric control and the functions of boom confluence &disffluence ,swing priority have made the digging more efficient . 3.KAWASAKI hydraulic system and South korean cylinders . 4.Multifunctional monitor ,four working modes ,two ways to control the throttle :hand and electric.