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Table 2: Drill rig performances

Model Hole diameter Drill-string Secoroc bit type
ROC D5 76mm T45 flat front spherical
ROC D7 89mm T45 & T51 flat front spherical
ROC F7 89-102mm T51 flat front spherical
ROC L6 112 & 115mm COP 45 concave front 280m/day
ROC 742 76 & 89mm T45 flat front spherical