... with directional circulation, it’s equipped with WB850/4-80 mud pump witch adopts the slurry as the ... out hydraulic DTH hammer drilling rock breaking with WB850/4-80 mud pump, can carry out core-drilling ... 102,60,38,22,13,16 reverseTorque(kN/m)5.4-5.Single rope lifting capacity of main windlass(kn) ... mm)108*108*10500Assistant pipe(mm)89*10*9000WB850/4-80 plunger pumpDiameter of cylinder(mm)106Stroke of ...