low-quality coal的用法和樣例：
例句
- It intuoduces the tech-economic effects about transforming chain furance to fluidizing bed,provides conditionsFor faulty coal use.
介紹鏈條爐改成沸騰爐的技術經濟效果，為改善鏈條爐操作性能，為劣質煤的推廣應用，提供了完全可能實現的途徑。 - The procedure for reformation and the new spiral-tube type of air preheater used may be well observed by other thermal power plants where boilers are fired with low quality coals.
改造採取的措施及採用新型的螺旋槽管空氣預熱器，可對燃用劣質煤的電站鍋爐改造起到良好的借鑒作用。
