wringer      
noun [ C ] uk/ˈrɪŋ.ər/ us/ˈrɪŋ.ɚ/ (UK also mangle)
 衣物绞干机
a machine used for pressing water out of clothes by putting the clothes between two heavy, smooth, round bars
 Idioms      
go through the wringer/put someone through the wringeridiom  使受尽磨难;使历经艰苦
to have a difficult experience that upsets you a lot, or to make someone experience this
  The girl's parents have been through the wringer since she disappeared. 这个女孩失踪以后,她的父母历经了各种磨难。 
 put someone through the wringeridiom  informal (提出刁钻问题)使(某人)饱受折磨,使经受考验
to ask someone difficult or unpleasant questions, often to find out if they are doing their job in a satisfactory way
  Outside investigators will put the company's accounting practices through the wringer. 外来的调查人员将会对这家公司的会计工作严加审查。