backflush device

例句：

1. 1. The backflush device is designed to prevent water from flowing backwards into the drain.
   回冲装置设计用来防止水反向流入排水管。
2. 2.The engineer used a backflush device to clear the pipes of debris.
   工程师使用回冲装置清除管道中的杂物。
3. 3. The backflush device is essential for maintaining the cleanliness of the sewage system.
   回冲装置对于保持污水系统的清洁至关重要。