Variable-frequency regulator的用法和樣例：
例句
- The switchgear cabinets for this crane series feature frequency converter technology.
此系列起重機的開(kāi)關(guān)箱采用變頻器技術(shù)。 - When the frequency changer has malfunction, power frequency is adopted, and the motor speed is nonadjustable.
萬(wàn)一變頻器出現故障時(shí)，可工頻驅動(dòng)，轉速不可調。
