有杆抽油系统无级调冲次工艺研究
姜建胜, 林立, 由宏君, 刘先刚
Stepless stroke regulation technology for rod pumping system
JIANG Jian-sheng, LIN Li, YOU Hong-jun, LIU Xian-gang
石油学报 . 2005, (2): 111 -114 .  DOI: 10.7623/syxb200502026