Clamshell clamshell excavator, also called the grab. Its backhoe features: "straight up and down, the weight cut soil." Ⅰ, Ⅱ type of soil should be used to stop the excavation below the surface, Hunan selling used excavators, used in soft soil area in the excavation pit, caisson and the like. Especially for digging deep, narrow pit, the old dredge digging water channels and silt, or for loading gravel, slag and other loose materials. Excavation ditch excavation side excavation and positioning two kinds. As will grab a gate made of strips, can be used to load ore block log yard, wood, timber. Overall, lower domestic excavator holdings, but the product price is too high, sales model to a finance lease or mortgage-based, second-hand excavator sales market, once credit easing excavator sales will rebound the best products. Predictable, 2011-2013, as the recovery in the world to pick up the Chinese economy, real estate and Urbanization of the conduct, the tonnage excavator sales will continue to grow, net uncertainties 2011 - 2013 tonnage mining machine will increase the growth rate of over 15%.