掣板 meaning in English

trigger

For people who cannot use their hands well , control buttons and panels should be put at the front of the equipment so that they can be reached easily
对于手部不良于活动的人，有关设备的控制钮及操作掣板应放在设备前面端，以便使用。
Two serious accidents occurred in recent months , both involving short - circuiting of live parts on low voltage electrical installations . in each case , the registered electrical workers ( rews ) did switch off the mains and essential supplies at the consumer s switchboard in order to carry out periodic maintenance inspection . however , they did not isolate the electricity supply from the power company
在这两宗个案中，注册电业工程人员在进行定期检查时，并未联络电力公司切断来电电源，而祗是将用户开关掣板的总掣及后备电源关掉，所以这些电掣的来电方向，仍然是带电。