生产实践表明，采用优化后的定径工艺参数，钢管的椭圆度减小，外径精度提高。

Relevant operation practice has proven that with the optimalized sizing process parameters, steel tubes sized by the said mill possess decreased ovality and higher O. D. accuracy.

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圆锥滚子基面与其外径表面的精度之间存在着联系，探讨了两者间必然规律，给出了公式。

There is relationship between the accuracy of rolle base face and its outer diameter surface. Inexorable law between they two was discussed, and relative formulas were given.

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本文研制的高精度电感式外径检测仪采用二个电感传感器，能自动显示各种轴套的外径、平均直径和圆柱度。

This paper introduces an outer diameter detector, using two inductance sensors. It can automatically display the outer diameter, average diameter and cylindricity of all kinds of shafts and sleeves.

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