粒径级配
size grading
grain size gradation
particle size distribution
particle size distribution， PSD
particle size distribution curve
coal particle distribution
the class of grain diameter
size distribution
watercourse grit
Grading
PSD
连续级配骨料
continuously graded aggregate
滤料级配
grading of filter material
密集级配
dense-graded asphalt mixtures
泥沙级配
sediment gradation
Sediment size distribution
composition of bed load
起动沙级配
incipient sediment distribution
类似级配沥青混合料
similar gradation asphalt mixture
来沙级配
gradation of shifting sand