Measure special chi of core appearance

The utility model relates to a measuring technical field, especially relating to a measure special chi of core appearance, it includes the short chi of base, high ruler and slidable, the base is the square of square for the top surface, the middle part on four limits of base top surface is vertical to be provided with high ruler, the vertical crack that is provided with in the middle of the high ruler, the short chi of slidable inserts in the crack, the short chi of slidable can be along setting up upper and lower, preceding, the back removal of crack on high ruler, the base top surface is equipped with two orthogonal scale seals of a government organization in old china, the both ends of the scale seal of a government organization in old china are located the mid point on base top surface two non -conterminous limits respectively. This measuring tool can used repeatedly, measuring position evenly distributed, easy operation, measurement of efficiency is high, but four points of simultaneous measurement test