A.75%-90% B.65%-80% C.60%-75% D.50%-60%
A.貧煤、瘦煤、焦煤、肥煤、氣煤、不粘煤及長焰煤 B.貧煤、瘦煤、焦煤、肥煤、氣煤、弱粘煤、不粘煤及長焰煤 C.貧煤、瘦煤、焦煤、肥煤、氣煤 D.瘦煤、焦煤、肥煤、氣煤、不粘煤
A.0-10% B.0-15% C.0-20% D.0-25%