【摘要】 本文分析了双层炉排锅炉、茶炉冒黑烟的原因，并试用一种新式的下炉门防止其冒黑烟，效果良好，建设推广使用．更多还原

【Abstract】 This paper analyzes the causes of double layers coal oven and little stand-up oven, and try to use a new under oven door to Preclude its black smoke. its effect is better. We suggest that the method should be spreaded and ed.更多还原