实现渗流力学中的平面径向流公式计算，知多求一，计算结果会用红色字体显示。-Realization calculate seepage mechanics plane radial flow formula, known more for one, the results will be displayed in red font.

一个比赛用的计时器，大字体显示。具有掉电重启继续计时的功能。用VB编写代码，用单个字符单个LABEL控件的方法防止闪烁。-A race timer, large font display. Power off timer function to restart continue. With VB code with a single character single LABEL control method to prevent flicker.