continuous drainage造句

Continuous drainage is necessary to keep Holland from flooding.
For patients who are unable to tolerate disposable straight catheters, a Foley catheter allows continuous drainage of urine into a sterile drainage bag that is worn by the patient.
There is a continuous drainage culvert between the tracks to lead ground water away to the lowest point of the tunnel, under Sudbrook Pumping Station, where it is pumped to surface.
If the tube is to be used for continuous drainage, it is usually appended to a collector bag placed below the level of the patient's stomach; gravity empties the stomach's contents.
It's difficult to find continuous drainage in a sentence. 用continuous drainage造句挺难的