A.1.7t/m3 B.1.8t/m3 C.1.9t/m3 D.2.0t/m3
A.1.0~1.5倍 B.1.5~2.0倍 C.2.0~2.5倍 D.2.5~3.5倍
A.2m B.3m C.4m D.5m