在墙上装有一个开关板（控制盘、配电箱）。
There is a switch board (control panel, distribution box) mounted on the wall.
本标准规定了紧急下降开关降低病人在一只手的控制器或控制电路板故障事件的能力。
The standard emergency lowering switch provides for patient lowering capabilities in the event of a hand controller or control board malfunction.
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.
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