The papers study the technology of variable speed drive in electric submergible pump.
本文主要论述了潜油电泵系统变频调速的应用技术.
Impact of variation in water level of the Yangtze River after the construction of the Three Gorge Dam on the transmission of schistosomiasis in jiangsu, china ⅲ. experimental observation of impact of submergible depth on schistosome egg hat
三峡建坝后长江江苏段水位变化对血吸虫病流行影响的研究Ⅲ.不同水深对血吸虫虫卵孵化、毛蚴感染钉螺的影响
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