Some switches also contain a rheostat to control the brightness of the instrument panel lights.
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。
Examine the control panel, operating instrument and auto components, all the protection switches are on OFF position or STOP position.
检查控制盘内外部各操作和自动元件有无异常，各操作用防护开关是否关闭或者在停止位置。
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