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Journal of Drainage and Irrigation Machinery Engin  2006, Vol. 24 Issue (5): 25-28    DOI: 10.3969/j.issn.1674-8530.2006.05.006
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Application of frequency conversion project in drainage pumping stations and discussion of energy-conserving mechanism
YUAN Yun, YU Sai-feng, LIN Lei, ZHANG Li-min
Ningbo Municipal Sewage Treatment Co., Ltd., Ningbo, Zhejiang 315040, China

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