A XCMG dedicated hydraulic extensible crawler chassis was running and operate freely on an area of muddy land. Deep pile holes were drilled perfectly while the drill bits rotated smoothly. Recently, XCMG’s Rotary Drills, two XRS1050 and a XRS800, helped at the Lu’an Group’s coal to liquid oil plant project. The project, with an investment of ten billions RMB yuan, will be the world's largest coal to liquid oil base after its completion by 2016. The XCMG rotary drills ensure the construction progresses with superior stability and high efficiency.