Excavator, also called excavating machinery, is a mining above or below the machine for the surface of materials with a bucket of earth moving machinery, transport and loading or unloading of vehicles to the yard.Excavator material is mainly coal, soil, sediment and pre loose soil and rock. In recent years as the development of construction machinery,relatively fast development of excavator, excavator has become one of the most important engineering machinery in engineering construction. The three most important parametersof excavator: operating weight (mass), the engine power and bucket capacity.
