单词：powdered coal
powdered coal的用法和样例：
例句
- Miners are finished extracting coal here, and the sides of the tunnel have been sprayed with quicklime to suppress explosive coal dust.矿工们已经完成了这里的煤炭开采，坑道两壁都喷上了生石灰以防止煤尘爆炸。
- The trial and industrial practice demonstrate that blast furnace pulverizing coal injection lead extraction process is successful and effective.试验和工业实践证明，鼓风炉粉煤喷吹炼铅工艺是成功有效的。
- The technology of coal powder spurted burning is applied in the annealing furnace for low carbon steel wire heated with coal powder.煤粉加热低碳钢丝退火炉采用粉煤喷射燃烧技术，节能效果显著，环境污染有所改善，是值得推广的炉型。
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