... exploration or construction, fit for technology of wire line core drilling and reverse circulation drilling, we ... Hole dia. (mm)300, 500, 1000Hole depth (m)200-400, 50-100, 25-50Hole dip angle ... Max. lifting capacity (single line, lower speed, kN)29Hoist lifting speed (3rd layer, m/s)0.82, 1.53, ... 2.16, 3.13Wire rope dia. (mm)15.5Drum capacity (four layer, m)52Retraction device stroke (m ...