operating water level造句

The boiler's operating water level was always maintained within this belt space, keeping the tubes entirely submerged.
When storm surge threatens to exceed the maximum operating water level of a canal, the Corps closes the gates and operates the pumps.
The most likely location for wastage developing was around the uptake flue, at the operating water level where activity and erosion was most severe.
It's difficult to find operating water level in a sentence. 用operating water level造句挺难的