... on different stratum, we can adjust torque and rotary speed of drilling rig to increase drilling rigs adaptability. At the same time, we can ... Frame (mm):900Lifting force of Power Head (kN):65Lifting speed of Power Head (m/min):1,5.9,15Feeding Force of Power ... Head (kN):33Feeding Speed of Power Head (m/min):0-2timing,11.5,29.5Input Power ...