Applicable range of this model and way for improving control surface efficiency 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。
On the basis of a large number of field data, the regression equations of displacement coefficient, down-hole power loss and surface efficiency 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；
The analytical results indicate that the control surface efficiency analyzed based on nonlinear experimental aerodynamic forces and linear theoretical aerodynamic forces are different.
研究表明：使用非线性试验气动力和线性理论气动力所分析得到的舵面效率具有较大的差别；
The analytical results indicate that the control surface efficiency analyzed based on nonlinear experimental aerodynamic forces and linear theoretical aerodynamic forces are different.
研究表明：使用非线性试验气动力和线性理论气动力所分析得到的舵面效率具有较大的差别；
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