Based on the motion function and characteristic in different modes of water system of air-conditioning, the differential of circulating water volume pump and elevation of pump were analyzed.

根据空调水系统在不同工况下运行的性能与特点，分析冬夏及部分负荷运行时，空调水系统的流量和扬程差异。

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Based on the motion function and characteristic in different modes of water system of air-conditioning, the differential of circulatory water volume pump and elevation of pump were analyzed.

根据空调水系统在不同工况下运行的性能与特点，分析冬夏及部分负荷运行时，空调水系统的流量和扬程差异。

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This paper calculates, analyses and determines the pressure point of maximum of ouput power and saving-energy efficiency of differential pressure and Limited pressure variable displacement pump.

本文计算、分析、确定了限压式变量系和差压式变量泵输出功率最大值和节能效率最大值的压力点；

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As inflation begins to take hold, though, the reduction or removal of government stimulus programs, and especially the differential speed at which this will occur around the world, will pump increased volatility into commodity markets.

FORBES: Watch Out In Iron Ore, Coal, Copper When Easy Money Policies Are Done, Says Rio Tinto