1,British Richard joint-venture made engine model 2,Apply to drill sandstone,shale,and limestone 3,X-shaped rack 4,Low price Main Technical Parameters: (Drill pipe length)3660mm (The type of drill)Three blade cutting bits(Drill diameter)80mm(Promote travel)3200m(Drilling hole diameter)80mm(The depth of drilling hole)3200m(Rotary torque)980N.m(Turning speed)550/280rpm(lifting capacity)10000N( ...