commutator bar

例句：

1. 1. The commutator bar is essential for the proper operation of the motor.
   换向器棒对于电机的正确运行至关重要。
2. 2.During maintenance, the technicians carefully inspected the commutator bars for any damage.
   在维护期间，技术人员仔细检查了换向器棒，以查找任何损坏。
3. 3.The commutator bar was replaced with a new one to ensure smooth operation.
   为了确保顺畅运行，更换了新的换向器棒。