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.
用定值电阻代替滑线变阻器，用分压器调节电压，可使二极管反向特性的测量更加方便。
2
PH value of sliding agent in mercerized wool and nylon acid dyes, reactive dyes, mordant dyes or metal complex dyes for dyeing, dye bath can aptitude acidic PH value from sliding.