EFF: Motor operating Efficiency. This is used with the Power Factor field to determine kVA. Motor groups should use an average value of efficiency.是什么意思_EFF: Motor operating Efficiency. This is used with the Power Factor field to determine kVA. Motor groups should use an average value of efficiency.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句