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Hot Sale 200m Depth Core Drilling Rig for Engineering Geological Survery. Widely used hydraulic feed drilling rig with the characteristics of high power, high lifting force, and high torque transmission. GK-200 Exploration Drilling Rig is suitable for geological exploration, geological core drilling, small grouting holes, blasting holes, and small water well holes. Drilling Depth 0-200m: A maximum drilling depth of 200 meters allows for versatile applications in various geological explorations and water well projects.