... beam four-pillar structure, consisting of body, oil cylinder, moveable working table, hydraulic transmission system, electric control system, lubricating system etc. ... of top beam, bottom beam, slider, vertical pillar, moveable working table, locking nut, and adjusting nut etc. the upper beam ... cylinders are all made of 35 forged steel.The movable working table, of which body is ZG270-500 cast steel ( ...