您的代码可以设置一个五秒钟的定时器，接下来继续进行重绘屏幕等操作。
Your code can set a five-second timer and continue, say, redrawing the screen.
最后的操作是对账单表的更新，这需要花费一定时间。
The final kicker is an update to the bill table which takes quite some time.
定时器控制泵的运转时间，较便宜且操作简单。
Timer control pump operation time, less expensive and easy to operate.
定时器控制泵的运转时间，较便宜且操作简单。
Timer control pump operation time, less expensive and easy to operate.
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