基本解释罗茨增压泵英汉例句双语例句This paper introduced the advantage and characteristic of L-series roots blower, which could substitute the liquid ring pump in the process of hydrogen transportation.本文介绍了L系列罗茨鼓风机在氢气输送过程中替代液环泵的优势与特点。Roots blower pump更多例句