1,HGY-300 Drilling Machine 2,Full-hydraulic chuck or ball-type chuck 3,Widely ... , South Korea, Costa Rica etc.Features of soil sampling Drilling Machine:1) Wide range of suitable rotary speed to meet various ... parts, such as clutch, transmission case and shifting structure. Technological Data of soil sampling Drilling Machine ModelHGY-300 Drilling MachineDrilling depth( m ...