sweep gate pulse

例句：

1. 1. The sweep gate pulse is used to control the flow of water in the pipeline.
   扫频脉冲用于控制管道中水流的流动。
2. 2. The sweep gate pulse was generated by a computer program.
   扫频脉冲是由电脑程序生成的。
3. 3. The sweep gate pulse was used to detect the presence of an intruder.
   扫频脉冲被用来探测入侵者的存在。