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Point anchoring rock boltis composed of screw thread steel bar , high strength plate ...
Chemical rock bolt (Prestressed Bolt) : Thread bar Bolt is composed of screw thre...
grout bolt(Prestressed Bolt) : Thread bar Bolt is composed of screw thread steel b...
Installation Procedures 1.Drill a hole with punch according to the diameter ...
Contact: Lisa Email: [email protected] Skype: htpipelisa Fastener Type Washer/bolt&...