名词短语
中文翻译：分级绝缘导线
同义词：
['grade-rated insulation', 'gradedinsulation']
例句：
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1.The new circuit breaker uses gradedinsulation to prevent short circuits.
新型断路器使用分级绝缘来防止短路。
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2. Theengineer carefully graded the insulationon the wire to ensure it was evenand strong.
工程师仔细地对电线上的绝缘层进行分级，以确保其均匀且坚固。
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3. The insulation is crucial forprotecting the electrical equipment from overheating.
绝缘对于保护电气设备免受过热至关重要。