Closed water systems, vertical with the process, the level of different programs, dual control, single-stage pumps, variable flow system.

水系统选择闭式、竖直同程、水平异程序、双管制、单级泵，变流量系统。

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The digital closed loop current capacity real-time control system is one kind applies specially in the hemodialysis water disposal systems new technology.

数字闭环流量实时控制系统是一种专门应用于血液透析水处理系统的新型技术。

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Whereas, the operation conditions of two kinds of soft water closed circulating systems which were imported in the late 1980's are presented.

同时也介绍了国内80年代后期引进的软水密闭循环系统的使用情况。

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According to Ben Urbonas, president of the Urban Watersheds Research Institute, these nutrient contaminants tend to be more of a problem in closed water systems,like lakes, where concentrations can build up.

VOA: standard.2010.08.04