manual saturation control

例句：

1. 1. The manual saturation control system is designed to prevent overheating in the engine.
   手动饱和控制系统旨在防止发动机过热。
2. 2. In this experiment, we used a manual saturation control to monitor the pH level of the solution.
   在这个实验中，我们使用手动饱和控制来监测溶液的pH水平。
3. 3. The manual saturation control was crucial for maintaining the stability of the chemical reaction.
   手动饱和控制对于维持化学反应的稳定性至关重要。