Rotary Core Drilling Rig 1,Max depth:200m with ... chuck 4.water well, soil/ rock drill Rotary Core Drilling Rig(HGY-200):Brief introduction: 1.32 years ... Use: for geotechnical investigation,exploring, prospecting, water well drilling;Widely used in the construction of the projects e. ... large diameter boring pile and small diameter diamond core deep hole drilling, etc. Rotary Core Drilling Rig(HGY-200)