A.0.1-0.2mB.0.2-0.3mC.0.3-0.4mD.0.4-0.5m
A.80%-90%;10%-20%B.70%-80%;20%-30%C.60%-70%;30%-40%D.50%-60%;40%-50%
A.矸石;精煤和中煤B.精煤;中煤和矸石C.中煤和矸石;精煤D.中煤;精煤和矸石