“清零”键，清除传感器因零点飘移而产生的零位误差。
Press the "reset" key and deletes the zero position error caused by the shift of the zero point in the sensor.
在二级管特性研究中，由于电磁波的影响引起的微安表零点飘移对测定结果有较大影响。
In the studying of the specific property of the diode, the zero drift of the microammeter is caused by electromagnetic wave, and it has great effects on the result of the measure.
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