... to distortion,2.long life,3.reduce labor costs.4square linear Marble Engraving MachineFeatures 1. Profiled steel welded lathe bed, stabilizing ... high accuracy, fast speed and strong power4. Imported square linear guide rail ensures high accuracy, maximum work load and long service time5 ... Cooling Collect 3.175, 6, 12.7 XYZ Guide Rails Linear Square RailTransmission Rack Gear of X.Y axis , Ball Screw ...