排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2007, Vol. 25 Issue (1): 1-8    DOI: 10.3969/j.issn.1674-8530.2007.01.001
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Pump efficiency and conversion methods for efficiency
YAN Deng-feng1, YE Jian2, CHEN Mao-man2, SHEN Ri-man2
1.School of Hydraulic Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; 2.Beauru of Water Resourse, Nanjing, Jiangsu 210029, China

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