faulty unit

• 次品

faulty unit的用法和样例：

例句

1. As a result, many thousands of tyres have to be assumed to be potentially faulty after only one defect is discovered.
   所以，虽然只有一个轮胎被发现是次品，数千个轮胎却不得不被假定为全部存在不合格问题。