The experiment result : In some constant flow ,the unequality degree of particle decreases while concentration of particle increases.
实验结果表明：当液体流量一定时，颗粒的不均匀度随浓度增加而减小。
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The distribution of particle concentration in pipe is unequality and the unequality degree varies with the cent of volume and regime flow;
颗粒在管内的浓度分布是不均匀的，随颗粒的体积分率和流型的变化而变化；
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