对红砂岩进行粒度分析，得出其平均粒径和概率累计曲线。
The average grain diameter and cumulative relative curve of red sandstone are obtained by the grain size analysis.
对超精密磨削所用细粒度金刚石砂轮磨粒粒径的分布特点和砂轮表面上磨粒的轮廓波长进行了分析。
Detailed analyses of the grain size distribution characteristics and the grain profile wavelength of fine diamond grinding wheel used for ultra-precision grinding are presented.
动态激光粒度分析仪测定其平均粒径大小和分布；
The size distribution and mean diameter were measured by laser light scattering technique.
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