... coal mine 1,Horizontal anchor rodMaterial: thick wall seamless high-pressure alloy pipe; strip steel Craft: singleflighted, prestressed wire winding, welding. Feature ... improve the breakage possibility and coal-crushing efficiency.2,Horizontal anchor rod NO.Specification(mm)Diameter(mm)Length(mm) Thread type ... -2500 32-18.500-2500 32-B19500-2500 3,Horizontal anchor rod Horizontal anchor rod