Applicable range of this model and way for improving control surfaceefficiency have been pointed out.
指出数学模型的适用范围和改善操纵面效率的途径。
2
On the basis of a large number of field data, the regression equations of displacement coefficient, down-hole power loss and surfaceefficiency for pumping wells are established.
本文以大量的现场测试数据为基础，建立了抽油机井排量系数、井下功率损失及地面效率的回归方程；
3
The analytical results indicate that the control surfaceefficiency analyzed based on nonlinear experimental aerodynamic forces and linear theoretical aerodynamic forces are different.