A.110~115gB.110~120gC.100~115gD.105~115g
A.≤6.00% B.≤4.00% C.6.01%~9.00% D.>9.00%
A.煙煤、煤泥 B.煙煤和無煙煤 C.各種煤 D.煙煤和褐煤