Hold the ring to control的用法和樣例：
例句
- For the finite propulsion reentry guidance, the conventional closed-thruster equation based on open-loop control loses its way.
摘要解決有限推力模型的再入飛行器初制導問題，利用傳統開環控制的關機方程達不到要求的精度。 - Electrical power pulse signal will be entered into angular displacement or displacement of the Central Line control components.
步進電機是將電脈衝信號轉變為角位移或線位移的開環控制元件。
