sphericity error of minimum zone applies to the criterion of sphericity error of minimum condition principle.
最小区域法是符合最小条件的一种直线度误差评定方法,但较难实现。
aimed at the spheric face of smaller diameter and sphericity of a higher-precision, a new method called 「pneumatic measurement」 is used in the area of sphericity error measurement.
针对被测球面轮廓的尺寸小、精度高的特点,采用「气动法」测量球度误差。
the basis which draw up the standard of sphericitytolerance and evaluate sphericity error is built on the basis of these theory.
为球度公差标準的制订以及球度误差的评定打下了理论基础。