The drilling efficiency of the open-pit DTH drilling rig is lower than that of the top hammer drilling rig, but the performance of the DTH drilling rig is the best under the requirements of large diameters and depths of more than 30 meters. If you are pursuing economic benefits, I suggest choosing a saparated drilling rig. If you are pursuing work efficiency and work safety, I suggest purchasing an integrated drilling rig. We will customize the best rock drilling plan for you according to your needs.