switch knob

While holding the release button depressed , pull the knob and shaft out of the headlamp switch.

保持钮的按住状态, 将按钮和轴拉出开关.

The system real-time displays steam drum pressure, fuel oil temperature and water level, switch valve, knob and button can be operated, indicator light shows the corresponding working condition.

系统中实时显示汽包压力、锅炉燃油温度、锅炉水位的值，开关阀、按钮、旋钮都可进行操作，指示灯显示相应的工作状态。

To switch the oven on, turn the knob, and bob's your uncle!

把烤箱的电源接通, 转动旋钮, 完事大吉!

Another problem: the door consisted of a smooth, solid sheet of metal with no knob and no activating switch other than a card key slot in the wall beside it.

另一个问题：门有有在它旁边的墙壁一个卡片钥匙水沟之外的没有把手和没有启动开关的金属平滑的，坚硬的张。