One approach has been to use variable-lift inlet valves that can be raised or lowered to different heights, depending on the amount of power needed.
一种途径通过所需的能量总数来使用可变化升降的入口阀门，它能以不同的高度升降。
2
Sprinkler is equipped with a centrifugal pump, the pump every time before water, must be added to a certain amount of water to the pump, plus the need to close the water inlet.
洒水车配备的是离心式洒水泵，该泵每次吸水前，必须向水泵内加入一定量的引水，加完后必须关闭加水口。
3
Seal leakage test on the inlet valve under a hydrostatic pressure equal to maximum static head. The leakage shall not exceed the amount guaranteed by the Contractor.