罗斯泵中的三叶泵的动画模拟,可以方便看出泵的工作原理-the animation of roots pump

大学时写的js计算器程序能进行简单加减乘除，和科学运算：（开根号，次幂，log……）-Js college calculator program written in simple addition and subtraction to multiplication and division, and scientific computing: (roots and the power, log ... ...)