1.Used in mining, building, geological exploration, fire rescue. 2.Drilling diameter: 22-50mm 3.Drilling depth: 6m Rock Drills Crusher ... :Used in mining, building, geological exploration, fire rescue.Drilling diameter: 22-50mmDrilling depth: 6mDrilling angle: 45°overall dimension ... speed ≥200 r/minDrilling depth6mFuel tank capacity≥1.14 L Drilling speed≥250mm/minGasoline and oil mix proportion12:1Fuel ...