SD7NLGP bulldozer:Bulldozer Equipped With Torque Converter :Xuanhua Construction Machinery Co., Ltd. (Hereinafter referred to as HBXG) was founded in 1950. HBXG is the pioneer of the track bulldozer manufacture in China. Now it has become a state-owned public company, a leading manufacturer of Hydraulically Driven Bulldozer , Hydraulic Direct Drive Bulldozer, Track Excavator .