straight-line tunnel kiln

例句：

1. 1.The straight-line tunnel kiln is an important part of the production process.
   直线隧道窑是生产过程中的一个重要环节。
2. 2.The straight-line tunnel kiln has been used in many industries for decades.
   直线隧道窑在许多行业已经使用了几十年。
3. 3. The straight-line tunnel kiln has a high efficiency and low energy consumption.
   直线隧道窑具有高效率和低能耗的特点。