工业生产气啤机控制程序，带延时倒计时功能，手动调节延时时间，按键短按加减和长按连续加减；啤机工作时长按按键，然后继电器吸合使气啤机工作，直到倒计时完成，继电器自动断开，如果中途松开按键继电器也会断开，防止在气啤机下压过程发生异常，松开手就自然断开继电器。程序做了详细注解。本例已在keil 4里成功编译运行，头文件里的delay,display 需读者完成。-Gas beer machine control program of industrial production, with a delay countdown function to manually adjust the delay time, the key short press subtraction and long continuous addition and subtraction　presses keep pressing the button, and then relay pull the air beerwork until the countdown is complete, the relay automatically disconnect, release the button halfway relay will be disconnected to prevent abnormal process occurs in the air beer under pressure to release the hand naturally disconnect relay. The program detailed annotations.Compile and run this example has been successful in keil 4