不良级配的 Poorly graded

不良级配土 poorly-graded soil

不良级配 poorly grain-size distribution

级配不良的砂 badly graded sand

良好级配土 well-graded soil

级配不良土 graded soil

级配良好的 Well graded ; well-sorted

良好级配 well graded

级配不良 Poorly Graded