presetting mechanism

例句：

1. 1.The presetting mechanism ensures that the machine starts up smoothly when it's turned on.
   预调机制确保机器启动时平稳运行。
2. 2.The engineer used a special tool to adjust the presetting mechanism for optimal performance.
   工程师使用特殊工具调整预调机制以获得最佳性能。
3. 3. The presetting mechanism is designed to minimize vibration during operation, ensuring smoother operation of the machine.
   预调机制设计用于在操作过程中减少振动，以确保机器的平滑运行。