A.3/4~4/5 B.2/3~3/4 C.1/2~2/3 D.4/5~5/6
A.0.05~0.10g/cm3 B.0.1~0.5g/cm3 C.0.15~0.20g/cm3 D.0.01~0.05g/cm3
A.10m3 B.20m3 C.30m3 D.80m3