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Hfu-3A Hydraulic Core Drilling Machine Price. Explosion-Proof Safety: Equipped with 45KW explosion-proof electric motor for safe underground mining operations. Compact and Flexible: Separate structure design ensures small size, light weight, and convenient movement. Versatile Drilling Methods: Supports roller drilling, hard tungsten-carbide drilling, and percussive-rotary drilling. Stable Mast System: Sliding and extending mast allows bottom to touch ground or platform for enhanced stability. Wide Application Scope: Ideal for coal, geology, metallurgy, and engineering fields including gas suction and water injection holes. Certified Quality: Meets CE, RoHS, ISO 9001:2000, and ISO 9001:2008 standards for reliability.