👉 A "washboard" is a type of mechanical tool that is used to perform a variety of tasks, such as cleaning and polishing. It consists of a large surface made up of several layers of abrasive material, which are applied in a circular motion. The washboard is typically shaped like a square or rectangle and can be used for many different purposes depending on the task at hand. In the context of mechanical engineering, "washboards" refer to any type of tool that utilizes a washboard as
