In a corner behind her, the King's sheets were washing themselves in a wooden tub.

在她身后的角落里，国王的床单正在一个木桶里自动清洗着。

Multiple people would bathe naked in the warm  water held in wooden tubs without any privacy.

多人裸体沐浴在装在木桶中的温水中，没有任何隐私。

Then he took the wooden tub from the side of the wagon and filled it with water from the creek.

然后他从马车边上取下木桶，往里面装满小溪里的水。