blasting drilling of open pit mining - hardrockdrills.com
Oct 23, 2018· Big Top HammerDrill Rigsup to depth 30m and hole diameter 175mm Big Down The HoleDrilling Rigup depth 30m and borehole diameter 200mm Big RotaryDrill Rigsup to depth 50m and hole dia. 300mm Aspects of Open Pit Mining
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