backward-transfer signal

例句：

1. 1. The backward-transfer signal is used to control the speed of the vehicle.
   反向传输信号用于控制车辆的速度。
2. 2.The engineer was able to reverse the backward-transfer signal and fix the problem.
   工程师能够逆转反向传输信号并解决问题。
3. 3.In the event of a power outage, the backward-transfer signal will be sent to inform the authorities.
   在电力中断的情况下，将发送反向传输信号以通知当局。