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Geological spiral drill rod selection of high-quality geological special alloy steel pipe, drill pipe joint selection of high quality alloy junction drill pipe with high bending strength, welding firm characteristics of high production efficiency, quality and stability characteristics of ultra low helical screw blade design make geological spiral drill pipe with large torque and discharging speed and drilling molding good, not easy to drill the characteristics. Application: especially suitable for deep hole drilling and water discharging effect is not good and kind of soft coal seam of coal.