以下为句子列表：
英文: Until now,there have been a few reports on the damage of the water pumps caused by sand and water cavitation.By use of the test loop for solid and liquid two phases,under the condition of 3%head drop,the damage location and relative degree of the sand and
中文: 目前含沙水汽蚀对水泵损伤方面的报导甚少，本文利用固液两相流试验台，对离心泵闭式叶轮在含沙水汽蚀时（3％扬程下降点）的损伤部位和相对程度进行了试验研究，并将此结果与清水介质发生汽蚀时的损伤情况[13]及含沙水无汽蚀情况下的磨损情况[7]相比较，对其差异进行了分析，为今后进一步探讨叶轮损伤机理和叶型改进提供了实验依据。
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