washwater tank

例句：

1. 1.The washwater tank is used to clean the clothes before washing.
   洗水罐用于在洗衣服之前清洗衣物。
2. 2. The factory has a large washwater tank for its employees to use.
   工厂有一个大洗水罐供员工使用。
3. 3. The new model of the washwater tank is more energy-efficient than the old one.
   新型洗水罐比旧型更节能。