消光起伏法是一种新的颗粒测量方法，可用来同时测量两相流中颗粒的粒径分布和体积浓度。
Transmission fluctuation spectrometry (TFS) is a new method for particle size measurements, in which the particle size distribution and particle concentration can be measured simultaneously.
水力管道输送中，无论水平管还是垂直管，混合液的单位压降均同颗粒的体积浓度有关。
During the hydraulic conveying of solids water mixtures in horizontal and vertical pipes, the specific pressure drop of the mixtures is relative to volumetric concentration of solids.
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；
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；
The distribution of particle concentration in pipe is unequality and the unequality degree varies with the cent of volume and regime flow;
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