drainage coil

例句：

1. 1. The draining coil is responsible for removing waste water from the system.
   排水线圈负责从系统中去除废水。
2. 2. The new drainage coil has significantly improved the efficiency of the sewage treatment plant.
   新的排水线圈大大提高了污水处理厂的效率。
3. 3. The engineers had to replace the old drainage coil with a more efficient one.
   工程师们不得不用更高效的排水线圈来替换旧的。