Ancient computing tools- abacus

算盘( Abacus)是一种手动操作计算辅助工具形式。它起源于中国，是中国古代的一项重要发明。在阿拉伯数字出现前，算盘是世界广为使用的计算工具。现在，算盘在亚洲和中东的部分地区继续使用，尤其见于商店之中，可以从供应中国商品和日本商品的商店里买到。在西方，它有时被用来帮助小孩子们理解数字，而一些数学家喜欢体验一下使用算盘计算出简单算术问题的感觉。 优点：模型容易打印，设计时就考虑了FDM的特性做了修改，安装也很简单。缺点：珠子在杆上摩擦系数很小，容易自行移动，需要小心的操作。 Abacus is a form of manually operated calculation aid. It originated in China and was an important invention in ancient China. Before the advent of Arabic numerals, the abacus was a widely used calculation tool in the world. Today, the abacus continues to be used in parts of Asia and the Middle East, especially in stores, where it can be bought from stores that supply Chinese and Japanese goods. In the West, it is sometimes used to help children understand numbers, and some mathematicians like to experience the feeling of using an abacus to calculate simple arithmetic problems. Advantages: The model is easy to print, the design was modified with FDM characteristics in mind, and the installation is also simple. Disadvantages: The beads have a low fric