The average fineness 平均细度
The results reveal that the average surface spacing decreases with the increase of volume fraction of aggregates and fineness of aggregates.
研究结果表明：随着集料体积分数的增加和集料细度的提高，平均最邻近集料表面间距减小；
Rupture to a reasonable fineness via promotion after machine, vibrating feeder average into ball mill, destruction of ore by ball mill, grinding.
破裂至合理细度后经由提拔机、振动给料机平均送入球磨机，由球磨机对矿石进行破坏、研磨。
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