1·On the basis of a large number of field test data, the regression of the displacement coefficient and system efficiency for pumping unit wells were established.
本文在抽油机井大量现场测试数据的基础上，建立了抽油机井系统效率、排量系数这两个重要指标与诸影响因素之间的回归方程。
2·Calculation method of kinematic parameters for the unusual shape beam pumping unit.
异形游梁式抽油机运动参数的求解方法。
3·The steel plate that is attached to the end of the walking beam on a beam pumping unit.
固定于游梁式抽油机游梁端部的钢板。
4·This paper introduces the process of people death accident caused by crank of pumping unit, analyzes the causes in detail, and offers the improvement measures.
简述了抽油机曲柄致人死亡事故的经过，详细分析了事故发生的原因，提出了整改的措施。
5·In addition, this kind of hydraulic pumping unit will be simple and convenient to machine, operate and maintain, because the double-acting hydraulic cylinder will be replaced by a plunger cylinder.
此外，用柱塞缸取代双作用液压油缸，使这种液压抽油机具有加工简单、成本低、维护和使用方便等优点。