This paper expounds the principles of ring gr oove in improving the property of motor and analysizes the effect of parameters of ring groove on the property of motor.是什么意思_This paper expounds the principles of ring gr oove in improving the property of motor and analysizes the effect of parameters of ring groove on the property of motor.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句