短語詞組短語multistage segmental centrifugal vacuum pump 多級分段式離心真空泵Water ring centrifugal vacuum pump 水環(huán)離心真空泵vacuum centrifugal pump 離心式真空泵;[機]真空離心泵;真空離心泵vacuum centrifugal pump detail 真空離心泵vacuum m centrifugal pump 離心式真空泵 返回 centrifugal vacuum pump