Ferrofluid is a conductive lubricant used for over 30 years in the speaker industry in the magnetic gap of the voice coil assembly.是什么意思_Ferrofluid is a conductive lubricant used for over 30 years in the speaker industry in the magnetic gap of the voice coil assembly.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句