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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···
Happy Chinese New Year
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···