dust coal的用法和樣例：
例句
- The trial and industrial practice demonstrate that blast furnace pulverizing coal injection lead extraction process is successful and effective.
試驗和工業實踐證明，鼓風爐粉煤噴吹煉鉛工藝是成功有效的。 - The technology of coal powder spurted burning is applied in the annealing furnace for low carbon steel wire heated with coal powder.
煤粉加熱低碳鋼絲退火爐採用粉煤噴射燃燒技術，節能效果顯著，環境污染有所改善，是值得推廣的爐型。
