... grating ruler, valve group assembly of the hydraulic system and servo motor are all originally imported and have good performances and ... blocks (Y1, Y2) and backgauges (X, Y, Z,) are computer-controlled. The backgauges adopt ball screw and rolling guideway, ensuring a ... center, etc. can be specially manufactured. WE67K Series Electro-hydraulic Servo Numeric-control Bending Machine