ZR300D rotary drilling rig is a high-performance, high-reliability piling product designed and developed by our company with years of technological achievements in design and manufacture of foundation construction machinery and in combination with international advanced technology, in order to adapt to market demand. This high-tech product with highly integrated mechanical, electric and hydraulic systems is widely used in all fields of China's infrastructure construction thanks to its excellent maneuverability, huge drilling & lifting capacity. It is applying to pile foundation projects of the construction such as railroads, highways and bridges.