A.0.2~0.5% B.2~5% C.7~9% D.12~15%
A.30~35% B.50~55% C.70~75% D.90~95%
A.石礫、砂粒、粉砂粒、粘粒B.粘粒、粉砂粒、砂粒、石礫C.粉砂粒、粘粒、石礫、砂粒D.粘粒、石礫、砂粒、粉砂粒