In the air compressors produced by our factory, there are various cylinders and sleeve bearing boxes of various sizes. They have the perpendicularity requirements of the end face and the bore axis (Fig. 1 takes the cylinder as an example), and it is necessary to check whether the verticality meets the drawing requirements one by one during the machining process. Figure 2 shows the amount of perpendicularity of the end face of the measuring sleeve part and the inner hole axis of our design.
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