burning-in kiln

例句：

1. 1. The burning-in kiln is used to test the quality of the raw material.
   燃烧的窑炉用于测试原材料的质量。
2. 2. The engineers were busy inspecting the burning-in kiln before the production began.
   工程师们在生产开始前忙于检查燃烧的窑炉。
3. 3. The burning-in kiln was designed to reduce energy consumption and improve efficiency.
   燃烧的窑炉设计用来减少能源消耗和提高效率。