This paper analyzes the cause for resistance loss and effective factors on the resistance ceoficient of bottom valve of water pump, and does quantitive experiment.
本文对水泵底阀阻力损失的机理和阻力系数的影响因素作了全面的分析，并作了定量的实验研究。
The inventive method allows for a cost effective, fast and environmentally friendly production of a hot water reservoir (1) having high pressure resistance.
按照该发明的方法，成本有利、快速且对环境友好地制造出了热水储器(1)，其具有很高的耐压性。
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