small coal

• 粉煤

small coal的用法和样例：

例句

1. 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。
2. 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。