A.0.9% B.0.5% C.0.3% D.0.7%
A.0.2MPa B.0.4MPa C.0.5MPa D.0.1MPa
A.鏡煤>亮煤>暗煤>絲炭 B.絲炭>暗煤>亮煤>鏡煤 C.鏡煤>暗煤>亮煤>絲炭 D.亮煤>鏡煤>暗煤>絲炭