三螺杆泵衬套的最小工作长度分析
王兆伍,郑梅生,单玉霞,程爱华
Analysis of the minimum working length of case in three screw pump
WANG Zhaowu , ZHENG Meisheng,SHAN Yuxia ,CHENG Aihua
南京林业大学学报(自然科学版) . 2011, (06): 116 -120 .  DOI: 10.3969/j.jssn.1000-2006.2011.06.024