速度信号开关；
A float operated switch in the relay is used to initiate an alarm signal.
继电器内的浮控开关发动报警信号。
What might signal that such a switch is imminent?
是什么会预示着这样的转变的到来呢？
The transceiver can switch between driver mode and receiver mode in response to a signal.
收发器可以响应于信号在驱动器模式和接收器模式之间切换。
And send the signal instead of the locale switch.
发出代替现场开关的信号。
The switch provides a low-pressure differential signal to the engine control system.
此开关为引擎控制系统提供一个低压差动信号。
The switch provides a low-pressure differential signal to the engine control system.
此开关为引擎控制系统提供一个低压差动信号。
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