SAC-1300 Is mainly formed by main engine lifting system, spindle grinding system and conveyor belt driving system. Using the cylinder as the lifting guide sliding surface, which good clearance which stops the minor vibrations that others can't overcome during processing. In the spindle grinding system, the structure is driving by long spline and connected the guide by long key. Thus the spindle drives steady, safe and reliable. The conveyor belt running system is moving freely by using frequency converter with continuously variable. The whole machine has the advantage of good working performance. It is the preferred equipment of slabs calibrating and leveling.