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[机] 黑煤

1. They burned huge quantities of coal, their chimneys belching black smoke day and night.

2. The workers said they had even invented a machine that washes the coins, which get covered with black coal after going through the waste treatment process.

3. Analysts said the accidents were a warning of a possible surge of coal mine disasters as the demand for black coal rises in winter.

4. Analysts said the accident was a warning of a possible surge of coal mine disasters as the demand for black coal rises in winter.

5. The black refers to coal, and the white refers to salt.

6. The country's black lung therapy foundation has launched a public welfare project for coal miners nationwide.

7. Survivors described coal lumps flying into the shaft like a " black flood, " Xinhua said.