The overall performance of the optimized impeller is higher than that of the original impeller, and in the large flow rate range it is also higher than that of C4 impeller.是什么意思_The overall performance of the optimized impeller is higher than that of the original impeller, and in the large flow rate range it is also higher than that of C4 impeller.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句