来沙级配
gradation of shifting sand
泥沙级配
sediment gradation
Sediment size distribution
composition of bed load
起动沙级配
incipient sediment distribution
床沙成因
formation cause of the bedmaterial
床沙粗化
river bed armoring
armoring process of bed material
coarsening of bed
river load coarsening
armoring of bed material
床沙可悬粒径
particle size of suspend bed sediment
床沙质冲泻质分界粒径
separated sand size of wash load and bed material load
电脑数控机床配件
CNC machine tool fittings
机床床身
machine tool bed structure
machine tool bed