Sany Heavy Machinery Co., LTD is mainly undertaking the researching, production, and selling of construction machinery equipment. These machines concerning 25 fields, such as construction machine, piling machine, road construction machine, hoist machine, etc. These machines are of 120 types, among them, the competitive products are as follow: Rotary Drilling Rig, Horizontal Direction Drilling Rig, Diaphragm walling Grabs, Electro-Hydraulic Track Pile Driving Rigs, Air-Lift Reverse Circulation Drilling Rig, Horizontal Rotate and Jet Drill, etc. Both the market share and production volume of Rotary Drilling Rig are ranking first in China. Sany is the biggest manufacturer of Rotary Drilling Rig. The Sany Rotary Drilling Rig has now become the first brand in China.