semi-direct furnace

例句：

1. 1. The engineer designed a semi-direct furnace to improve the efficiency of the process.
   工程师设计了一个半直接式炉子来提高过程的效率。
2. 2. The company uses this type of furnace for its production lines.
   该公司使用这种炉子用于其生产线。
3. 3.The furnace is crucial in the manufacturing process as it directly affects the final product quality.
   炉子在生产过程中至关重要，因为它直接影响最终产品的质量。