varying head

基本解釋

Water infiltration of water storage pit irrigation is under varying-head conditions.
蓄水坑灌條件下的土壤入滲是在變水頭作用下進(jìn)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 .
這一研究成果為進(jìn)一步研究蓄水坑灌條件下的變水頭入滲及土壤水分運(yùn)動特性奠定基礎(chǔ)。
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.
東江泵站結(jié)合揚(yáng)程變化幅度大的特點(diǎn)，在技術(shù)改造中采用雙速全調(diào)節(jié)葉片的大型軸流泵機(jī)組型式，取得了明顯的節(jié)能效益。