级变速离心泵 single stage centrifugal pump: 单级离心泵; 一级离心泵single-stage centrifugal pump: 单极离心泵; 单级离心泵centrifugal pump of single stage type: 单级离心泵single-stage centrifugal booster pump: 单级离心式增压泵centrifugal multi stage pump: 多级离心泵下载手机词典可随时随地查词查翻译