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Water Well Borehole Drill Pipe Drilling Rod. Advanced Friction Welding: High bending strength and firm welding via advanced friction welding technology. High Fatigue Resistance: Ensures long service life and straightness requirements during deep hole drilling. Wide Application Scope: Suitable for mining, drilling, anchoring, and construction in various projects. Quality Certified: Passed CQC and ISO9001 certifications ensuring product safety and reliability. Customizable Specifications: Can produce various specifications of drill pipes according to customer requirements. Professional Manufacturer: 20000 sqm factory with advanced equipment and physical/chemical testing machines.