排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2013, Vol. 31 Issue (12): 1049-1055    DOI: 10.3969/j.issn.1674-8530.2013.12.008
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The minimal trapped-oil pressure of expansion stage in external gear pump
Li Yulong
Industrial Manufacturing College, Chengdu University, Chengdu, Sichuan 610106, China

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