The PSB830 thread bar is made of black steel with a continuous right-handed along the entire length of the bar.The continuous threading allows the cut of the bar with different length according to the design requirements and it also improves the adhesion between the bar and grouting.
Mining cable bolt for roadway support under ground could be 19 wire pc strand , in the field of mine rock reinforcement the Seale type structure is widely used because of its high tensile strength and process easiness compare with traditional bolts.
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