... drilling machine is top drive type multifunctional drilling rig which our company design and manufacture for ... formation according to market request.This series drilling rig is driven by the electromotor or diesel ... tunnel pipe shed.MDL-160*series multifunctional drilling rig advantages and characters.The machine has 5 ... ,85,80,90,1707.Impact power: 340,400,5908.Impact frequency(min-1):2500,1800,12009 ...