The conclusion shows that using high specific speed impeller in the first step of the two-stage axial flow pump can improve the trust and efficiency of the propulsion system.是什么意思_The conclusion shows that using high specific speed impeller in the first step of the two-stage axial flow pump can improve the trust and efficiency of the propulsion system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句