[计] 变频器
[医] 换频器

frequency converter的用法和样例：

例句

The switchgear cabinets for this crane series feature frequency converter technology.此系列起重机的开关箱采用变频器技术。
When the frequency changer has malfunction, power frequency is adopted, and the motor speed is nonadjustable.万一变频器出现故障时，可工频驱动，转速不可调。

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