motor starting rheostat

例句：

1. 1.The motor starting rheostat is used to control the speed of the engine's starter motor.
   电机启动调节器用于控制发动机起动机的速度。
2. 2. The engineer adjusted the motor starting rheostat to optimize the performance of the vehicle.
   工程师调整了电机启动调节器，以优化车辆的性能。
3. 3.During startup, the motor starting rheostat helps to ensure that the engine starts smoothly and efficiently.
   在启动过程中，电机启动调节器有助于确保发动机平稳且高效地启动。