boiler tube brush

例句：

1. 1. The boilertube brush is used to clean the insideof the boiler.
   锅炉管刷用于清洁锅炉的内部。
2. 2. The engineer used a boiler tube brushto remove the scale from the boiler.
   工程师使用锅炉管刷去除锅炉上的水垢。
3. 3.The boiler tube brush was a crucial toolin maintaining the efficiency of the boiler.
   锅炉管刷是维护锅炉效率的关键工具。