jacket drain valve

例句：

1. 1.The jacket drain valve is essential for maintaining the proper functioning of the system.
   外套排水阀对于保持系统正常运行至关重要。
2. 2.During a rainstorm, the jacket drain valve helps to prevent water from entering the house.
   在暴风雨期间，外套排水阀有助于防止水进入房屋。
3. 3. The technician carefully inspected the jacket drain valve before replacing it.
   技术人员在更换之前仔细检查了外套排水阀。