It radically solves the problems, which are lead by bad contacts of mechanical potentiometer, such as noise and excursion.
从根本上解决机械电位器因接触不良而产生的噪声、漂移等问题。
Before or tin plating nickel plating of bad contacts between the cathode, discharge sparks will melt into hollow copper hole.
镀镍前或锡电镀间的阴极接触不良，放电火花将铜材熔成凹洞。
The check is in the series of coil and four-way reversing valve control relay contact resistance increases, the bad, the contacts the voltage reduced.
经查是与四通阀线圈串联的控制继电器触点接触不良，电阻增大，致使电压降低。
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