电源输出电压0~20V连续可调，调整步长0.1V。输出电流0~3A连续可调，调整步长10mA。可以学习下电源使用(The output voltage 0~20V of the power supply is continuously adjustable, and the step length is adjusted by 0.1V. The output current 0~3A is continuously adjustable, and the step length is adju