plate drilling machine, Hydraulic system,used to clamp and release the workpiece, keep enough clamping force ... , vertical ram-type drilling spindle, hydraulic system, cooling system, auto-lubricating system, CNC system, electrical system and chip-conveyor etc.One or more movable ... 4×7.54×7.5Chip removal and coolingAutomatic chip removal,coolant circulation cooling Cooling pressure 0.4-0.6 MPaElectric ...