1,HGY-300 Drilling Machine 2,Full-hydraulic chuck or ball-type chuck ... ,Widely used in exploration 4,Drilling rod diameter 50 HGY-300 soil sampling Drilling MachineIt is widely used in the construction ... shifting structure. Technological Data of soil sampling Drilling Machine ModelHGY-300 Drilling MachineDrilling depth( m)300Drilling rod diameter.(mm)Φ50 Head ...