为什么硬币边缘是齿轮

你有没有想过，为什么硬币的边缘是凸起的？大多数人都不怎么在意他，但他存在的原因其实非常重要。原来在以前，不法分子会剪下一小圈硬币再花出去，一旦他们将剪下来的硬币攒够了，就可以将其卖掉。为了阻止这种情况的发生，于是就在硬币的边缘增加了锯齿。

have you ever noticed those ridges on the edge of quarters well， most people don't think much of them but the reason they exist was actually pretty important you see back in the day criminals would clip a tiny portion of their coins and once they saved enough of these clippings an infinite money glitch was born to stop this the government added ridges making clipped coins easier to detect。