... Easy operation 2.Economic drilling 3.High efficiency Hydraulic rock drill: 1. DT-60 drilling machine adopts advanced reverse ... . 5. For drilling clay, loam, sand, weathered rock and a small amount of gravel areas can better play ... mechanical properties. Main structure: host, tower, square bars, drill pipe, drill bits, mud pumps. Technical Parameter: Drilling diameter85mm—600mmDrilling depth60mDrilling ...