The working and operating suitabilities of hydraulic excavator

The computer controlling technology,electronic hydraulic system,check and measure technology and so on have been widely used in each machine and system of hydraulic excavator in recent years.And the excavators have been developed rapidly.The developing situation of the excavators in the working and operating suitabilities in the world from the force and speed,stepped double speed and auto shift, exceed small turn round and controlling suitability has been analyzed.