1, 4 column structure 2, Suppressing Cylinder 3, T Slot on the Table Features: 1, 4 column structure main body, consist of Top Beam, ram, Working Table, Column, Cylinder, Hydraulic Drive system and electrical system. Columns adopt #45steel material. Surface Hardness HRC38-42. 2, Suppressing Cylinder, material is #45steel, Hardness of surface of the Piston HRC38-42with long Usage life. Oil ...