- Fengfeng coal veins with a lingering historical roots, is the earliest one of the development and utilization of mine has been 130 years of mining history.
- 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.
- Prohibition was laid on the export of coal.