In the past several decades, the building way of filling heap in Rotary Drilling Rig has been getting older. Its elevated pore-forming quality and higher efficacy have put the technical foundation to the evolution of super-deep and super-large stone pile design, making such small business demand continuously growing. It is like driving the stone pile with a diameter corresponding to the span of a frequent glider down to 50 floors underground. Like the expression, "it's easy to visit the Heaven, but hard to go underground", this super-large and super-deep stone pile construction has introduced a massive challenge to the a variety of performance variables of the gear. We are Rotary Piling Rig Manufacturer in China for many years.