A.粒煤 B.小塊煤 C.中塊煤 D.混中塊煤
A.毛煤 B.原煤 C.混煤 D.混塊煤
A.15.2544修約為15.25 B.15.2560修約為15.25 C.15.2550修約為15.26 D.15.2650修約為15.26