Main Specification and Characters a. Water tank with enlarged heat radiating area provides better thermal equilibrium for the diesel system; b. Jingong 50 planetary power shift transmission features convenient operation and reliable performance; c. Articulated frame features small turning radius and high mobility, and chest structure provides strong load capacity; d. Double rocker arms Z-type linkage mechanism provides excellent overall performance with large breakout force,tractive force and short operation cycle time of equipment. Automatic equipment holding down enables short operation cycle time and high operation efficiency; e. Key link points of the equipment adopt anti-dust structure that prolongs the service life of the bearing pins; f. Constant-current open-type hydraulic power steering system provides consistent turing ability both under high and low rotate speeds and stable straight line moving; g. Top-grade Johnson maintenance-free battery provides reliable and stable operation.