Although external undercuts are identified in the product, the research did not consider the standard components that are required in producing such undercuts, which in this case, the use of sliders.

• 尽管产品被确认有外部的卡扣（倒钩）结构，但是研发人员并不认为生成这个卡扣（倒钩）结构所需的标准件，在这个例子中（在这种情况下），需要用到滑块。