bar commutator

例句：

1. 1. The bar commutator is responsible for the smooth operation of the motor.
   电枢换向器负责电机的平稳运行。
2. 2. The bar commutator is a critical component in the electrical system.
   电枢换向器是电气系统中的关键部件。
3. 3. The bar commutator needs to be regularly cleaned to prevent wear and tear.
   电枢换向器需要定期清洁，以防止磨损。