砂粒度 meaning in Chinese

fineness of sand

Testing method of cast shot and grit grain size
铸造金属丸及砂粒度的测试方法
Sg steel grits size distribution
钢砂粒度分布：
Erosive resistance of grey cast iron matrix composite has been investigated , on the condition of different volume fraction of wc and erosive angles and volume fraction of . the results showed that , the erosive resistance of composite with volume fraction of 27 wt % was the best ; volume abrasion rate of composites with different erosive angles was maximum at 50 angle , but volume abrasion rate was less at 0 and 70 angle ; on condition of the same volume fraction of wc and larger size of quartz sand in slurry , volume abrasion rate increased
结果表明：碳化钨体积分数为27的灰铁基复合材料的耐冲蚀磨损性能最佳；不同冲蚀角下复合材料的体积碳化钨颗粒增强铁基表面复合材料及其冲蚀磨损性能研究摘要磨损量在50 “冲蚀角处最大，在0 ”和70 ”冲蚀角处较小；在碳化钨颗粒体积分数相同的情况下，当浆料中的石英砂粒度大时，其体积磨损量增大。