... 3,Widely used in exploration 4,Drilling rod diameter 50 HGY-300 soil sampling Drilling MachineIt is widely used in ... , large diameter boring pile and small diameter diamond core deep hole drilling, etc. Brief introduction: 1.32 years professional ... and shifting structure. Technological Data of soil sampling Drilling Machine ModelHGY-300 Drilling MachineDrilling depth( m)300Drilling rod diameter.(mm)Φ ...