underwashing

例句：

1. 1. 名词：洗涤
   under
2. 1. The underwashing process involves cleaning and sanitizing the floor beneath furniture.
   下洗过程涉及清洁和消毒家具下方的地板。
3. 2. The underwashing machine is designed to clean the carpets without damaging them.
   下洗机设计用来清洁地毯而不损坏它们。