一些开关也包含一个可变电阻器，控制仪表板灯的灯光亮度。
Some switches also contain a rheostat to control the brightness of the instrument panel lights.
焊接电流与电压的准确测量对精密控制逆变电阻点焊电源和保证焊接质量至关重要。
The accurate measurement of welding current and voltage is very important to the exact control of resistance spot welding inverter and welding quality.
两个可变电阻的中心控制电机转速和触发电平。
The two variable resistors in the center are for controlling motor speed and trigger level.
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