粒径级配
size grading
grain size gradation
the class of grain diameter
coal particle distribution
watercourse grit
particle size distribution， PSD
particle size distribution curve
size distribution
Grading
particle size distribution
PSD
连续级配骨料
continuously graded aggregate
滤料级配
grading of filter material
泥沙级配
sediment gradation
Sediment size distribution
composition of bed load
起动沙级配
incipient sediment distribution
密集级配
dense-graded asphalt mixtures
全级配骨料混凝土
fully graded aggregate concrete