fire main

例句：

1. 1. The fire department is responsible formaintaining the fire mains in the area.
   消防部门负责维护该地区的消防主干管。
2. 2. The new building has a centralheating system that runs through the fire mains.
   这座新建筑有一个中央供暖系统，通过消防主干管运行。
3. 3. Thefire main was damaged during the recent stormand needs to be replaced.
   最近一场暴风雨损坏了消防主干管，需要更换。