JO2系列全国统一设计图纸的机座加工图上,标有尺寸和公差值,同时在技术要求栏内标上了“止口尺寸的椭圆度不大于其公差带的150％,且其平均值仍应在公差带范围内。关于这项技术要求和图纸尺寸的关系,往往被认为是有矛盾的,或者是降低了要 JO2 series of unified design drawings of the base processing drawings, marked with the size and tolerance values, while the column in the technical requirements marked "the size of the mouth of the ovality is not greater than 150% of its tolerance band, and its average It should still be within the tolerance band. The relationship between this technical requirement and the size of the drawing is often considered to be contradictory or reduced