Voltage control the voltage control is a rheostat that sets the operating point of the voltage regulator and therefore controls the output voltage of the generator set, within its design limits.
电压控制电压控制是设定电压调整器的运行点从而在设计范围内控制发电机组的输出电压的变阻器。
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Some switches also contain a rheostat to control the brightness of the instrument panel lights.