varying head

基本解释

Water infiltration of water storage pit irrigation is under varying-head conditions.
蓄水坑灌条件下的土壤入渗是在变水头作用下进行的。
The research results will have an important value for to study further varying-head infiltration and soil moisture characteristic of water storage pit irrigation .
这一研究成果为进一步研究蓄水坑灌条件下的变水头入渗及土壤水分运动特性奠定基础。
In the technology reform of Dongjiang Pumping Station, a large scale axial -flow pump with double speed is used to fitting in with the nature of the pump head varying greatly.
东江泵站结合扬程变化幅度大的特点，在技术改造中采用双速全调节叶片的大型轴流泵机组型式，取得了明显的节能效益。