Normet Rock Reinforcement D-Bolt® The Dynamic Rock Bolt

D-Bolt® the dynamic rock bolt.
Uncompromised safety is crucial when working in deep underground. The use of D-Bolt®, the first and original rock bolt designed for dynamic ground conditions, will mitigates the risk of hazard events and keep workers and equipment in safer working environment.

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nice technology, i wouldnt have found this video if it werent for people on youtube exploring abandoned tunnels.