... defense construction, hydrologic exploration, geothermal mine water well drilling, can also be used to other Engineering foundation hole ... rings, etc of the manufacturers of air compressor, can implement pneumatic DTH hammer drilling; If deserve to For gas ... Drilling depth (M) 200DrIlling diameter (mm) 500The capacity of main widlass(KN) 180The capacity of auxiliary windlass(kn) 120The height of mast ...