Jet grouting drilling rig Crawler jet grout drillSuit for railway, road, road foundation, bridge etc foundation construction.and anchoring hole drill Can use with single tube, double tube, three tube.Feature:compact structure, centralized control.Full hydraulic drive, no stage shift gears, suit for any kind of stratumTechnical parameterDrilling depth:50mdiameter of drill rod:42mm, 50mm and double ...