南京林业大学学报（自然科学版）
Study on rotors’ profiles of three screw pump using vector algebra
ZHENG Mei-sheng1, WANG Zhao-wu1, WANG Fang1, CHENG Fei2
JOURNAL OF NANJING FORESTRY UNIVERSITY . 2008, (04): 116 -120 .  DOI: 10.3969/j.jssn.1000-2006.2008.04.027

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