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Hydraulic Chuck Core Drilling Rig Underground Hydraulic Core Drill Rig. Full Hydraulic Drive: Advanced structure ensures reliable quality and excellent technology. Multi-Angle Tower: Flexible design allows tower touching the ground at various angles. Deep Drilling Capability: Maximum drilling depth reaches up to 800 meters. OEM & ODM Acceptance: Custom requirements and design drawings are fully acceptable. Experienced R&D Team: Led by Dr. Zhao Mingchun with 25 years of drilling tool design experience. Flexible Manufacturing: Key selling point allowing adaptation to various manufacturing needs. One Year Warranty: Comprehensive warranty coverage for one year after purchase. CE Certification: Product meets CE safety and quality standards.