... engineering drilling rig,high pore forming efficiency ZKL-33 Full hydraulic drilling machinery for civil engineering,engineering drilling ... × 2rotation (r/min)24.2torque (kN.m)43.4Allowable drill drawingout force (kN)400Pile holder Mass (t)60Column tilt ... multi-axis vibration hammer drill continuous wallBelow 120kW ZKL-33 Full hydraulic drilling machinery for civil engineering,engineering drilling ...