Magnetic fluid (MF) was added into the working air clearances of hydraulic servo-valve torque motor to improve the performance of the servo valve.是什么意思_Magnetic fluid (MF) was added into the working air clearances of hydraulic servo-valve torque motor to improve the performance of the servo valve.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句