... Adopt CNC technology, servo motor in feeding, with high efficiency, stable work piece precision.2.Key hydraulic, ... .With self-diagnosis failures function.9.This processing line is composed of transverse conveyor, overturn conveyor, infeed ... automatically.12.One marking unit in the drilling line. Marking stadia can be preset conveniently.13.Marking ... 16800 CNC Angle Steel Drilling & Marking Production Line