Underwater drilling with Robit® Hyper 31 Hammer in
2020-6-16 · Sub aquatic application drilling with Hyper 31 and DTH bit 90 mm Robit contributes to the development of infrastructure in Paracas, Peru. Average depth of drilling is 14 m below the sea level and actual drilling is 12 m into the bedrock. The Robit® Hyper 31 showed the best performance in rate of penetration, considering […]
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