“KAISHAN” brand  KT20 integrated open-air dth Drilling Rig machine is a new-type rock drilling equipment well-designed aimed at the demand of large-scale open-pit mine based on the experience of the company on development and production of down-the-hole drill rig for many years. The travelling, propulsion, rotation and angle adjustment of the surface dth drill rig are driven by hydraulic pressure and the power is strong; it is equipped with high-air pressure screw head and high-air pressure air hammer, with high rock drilling eff