- The Datong deashed coal, some different minerals, and five additives were used during the coal water slurry (CWS) preparation.
- The ash matter of coal is one of main effect factors in various coal researches.In this paper, five methods of acid washing to deash coal were studied.
- We need to replenish our stocks of coal.
- She piled on more coal before the fire go out.
- I add the coal on the flame continuously.
- They are ventilating the sap of a coal mine.