排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2006, Vol. 24 Issue (5): 20-24    DOI: 10.3969/j.issn.1674-8530.2006.05.005
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Controlling the installing quality of overhang-well-vertical-draw out core pumping set
KAN Yong-geng
JiangDu water project administer department of Jiangsu province, Jiangsu, Jiangsu 225200, China

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