clearing signal buzzer

例句：

1. 1. The clearing signal buzzer isused to alert drivers to clear the roadahead.
   清道信号喇叭用来提醒司机清理前方的道路。
2. 2. The clearing signal buzzerwas a crucial part of the traffic controlsystem.
   清道信号喇叭是交通控制系统中至关重要的一部分。
3. 3. The clearing signal buzzerwas used to guide vehicles through the constructionzone.
   清道信号喇叭被用来引导车辆通过施工区。