本文还介绍了一种根据实际情况把电位计和固定电阻结合的方法，提高了电位计在电路中的精度。
It also introduces a method according to the actual situation to put a fixed resistance combination of potentiometer, and it improved the accuracy of circuit.
相反定时电路使用固定电容器和可变电阻如果有必要更改的时间期限。
Instead timing circuits use a fixed capacitor and a variable resistor if it is necessary to vary the time period.
印刷电路板、电子零件、电阻电容器生产时固定；
Printed circuit boards, electronic parts, resistor capacitor production is fixed;
印刷电路板、电子零件、电阻电容器生产时固定；
Printed circuit boards, electronic parts, resistor capacitor production is fixed;
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