An Experimental Study on the Application of a New Type Oil-Retaining Ring to Reduce Unburned HC Emissions from S.I.Engines是什么意思_An Experimental Study on the Application of a New Type Oil-Retaining Ring to Reduce Unburned HC Emissions from S.I.Engines在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句