patrol telephone device

例句：

1. 1.The police were conducting a routine patrol in the area.
   警方正在该地区进行例行巡逻。
2. 2.He was assigned to patrol the perimeter of the building.
   他被指派负责巡视建筑物的外围。
3. 3. The soldiers were ordered to patrol the borders with caution.
   士兵们被命令小心巡视边界。