主控污染因子是什么?是应该宽泛的写成废水、废气?还是具体写COD、二氧化硫之类?

The rest of this article time control system is composed of MCS-51 Microcontroller AT89S51 do the main control unit,the external circuit with a 12MHZ crystal oscillator,74LS164 registers,reset circuit,three buttons,LED digital tube to do quadruple the time of the device shows no the needs of extended memory,can achieve its functions.Throughout the design,mainly using a single chip control theory,including hardware and software.In hardware,including relays,memory and display interface chip; software components,mainly the main program design.The software and hardware together organically,making the system able to correctly time.Debugging the system,the first hardware debugging,and then progressively overlay debugging; software debugging board first in the minimum system to ensure its working properly,the FBI again and the hardware system.Finally,the overall test after each module combination,the system of all functions can be achieved.The paper describes the main features of the microcontroller AT89S51 description and the pin,and explained the 74LS164 internal functions,on this basis to start the design.

W/L 是电动车窗的英文简写,the Window a Little,汉译就是车窗摇点（上或下）.电动车窗电路图,其实电动窗就靠一根电源线（打铁线也可以)和高级点带保险线,和驾驶室主线束在一起的.另外控制就是一个开关而已.

你是不是一共进行了三次量产,一次中断两次量产成功?这就是良率2/3=66%