The compensation grinding test on M131 cylindrical grinder showed that the designed measuring & compensating systems have improved the roundness of machined workpiece up to 30%.

在M131外圆磨床上的补偿磨削试验结果表明，所设计的测量补偿系统能够达到改善被加工工件圆度的目的，补偿后工件圆度误差减少近30％。

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Used for sampling the roundness sample of all kinds of fabric to test whose weight of unit area.

用于各种织物的圆形取样，供测定织物单位面积质量。

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A special test gauge for large aperture inner diameter and roundness is designed in this paper, and the gauge error is analyzed by calculating and determining its parameters.

介绍一种大孔径内径和圆度专用检验量具的设计，并通过计算确定该量具的设计参数并对该量具进行误差分析。

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