How Do Self-Drilling Hollow Bolts Reinforce Fractu···

When constructing expressways or railways, it is often encountered that there are high and steep slopes on the side of t···

Forged Head Mechanical Rock Support Bolt

he mine roof is effectively suspended by anchoring the different layers of strata together. The mine or tunnel roof is e···

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NingBo SPT Engineering Material Co.,Ltd(Primary business in manufacturing and selling rock support thread bars. Kinds of···

Underground rock support method

Features and Advantages• Particulary suitable for difficult ground conditions.• A high rate of installation since drilli···