hot-water supply main

例句：

1. 1. The hot-water supply main is responsible for deliveringhot water to every room in the building.
   热水供应主管负责将热水输送到建筑中的每一个房间。
2. 2. The hot-water supplymain was installed by a professional engineer.
   热水供应主管是由一位专业工程师安装的。
3. 3. Thehot-water supply main is essential formaintaining the comfort and hygiene of the building.
   热水供应主管对于保持建筑物的舒适性和卫生至关重要。