名词
中文翻译：换向器环
同义词：
['transformer ring', 'commutator', 'rotor ring']
例句：
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1. The commutator ring iscrucial for the proper functioning of themotor.
换向器环对于电机的正确运行至关重要。
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2. The engineers were taskedwith replacing the old commutator ringswith new ones.
工程师们被指派用新的换向器环替换旧的。
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3. The commutator ring was designedto minimize friction and improve efficiency.
换向器环的设计旨在减少摩擦并提高效率。