pillar hydrant

例句：

1. 1. The pillar hydrant is a crucial part of the firefighting system.
   柱式喷头是消防系统的关键部分。
2. 2. The pillar hydrant was installed to improve water pressure in the area.
   柱式喷头被安装是为了提高该地区的水压。
3. 3. The pillar hydrant is used to direct water flow during emergencies.
   柱式喷头用于在紧急情况下引导水流。