以下为句子列表：
英文: A test system was developed and an L9(3^4) orthogonal experiment design was used to test the pump efficiency under different flow rates, lifts, electric voltages and currents.
中文: 并设计了试验系统，采用L9(3^4)正交试验，以离心式水泵效率为试验指标，进行了离心式水泵的流量、扬程、电压和电流的测量。
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英文: The results show that some models with the bionic non-smooth working surfaces are very effective, with the pump efficiency enhancement of 3.45%, that means its growth rate of 6.81%.
中文: 对比试验表明，在离心式水泵的有效工作流量范围内，某些仿生改形表面的模型具有十分明显的效果，效率提高最大为3.45%，最大增效率为6.81%。
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