名词
中文翻译：换向器毂
同义词：
['gearbox', 'gear hub例句：1. The commutator hub is a critical component of the electric motor.（换向器毂是电动机的关键部件。）']
例句：
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1. The commutator hub is a critical component of the electric motor.
换向器毂是电动机的关键部件。
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2.The engineers had to replace the commutator hub due to wear and tear.
工程师们不得不因为磨损而更换换向器毂。
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3.The commutator hub plays a vital role in ensuring smooth operation of the machine.
换向器毂在确保机器平稳运行中起着至关重要的作用。