...耗 ? But I can not see Yeah, well, if not I will let down, no time consuming with you 滑动变阻器 ? Sliding potentiometer 最成功的一件事是和我们足球队 ? One thing is for us the most successful football team ..
Sliding resistance was replaced by the fixed value resistance, and potentiometer was used to adjust volt, it could make measurement of diode reverse characteristic more convenient.