短語(yǔ)詞組短語(yǔ)Helical attenuation flow 螺鏇衰減流helical -flow sludge blanket contact clarification 鏇流接觸澄清helical laminar flow 層流螺鏇流outer -helical-flow 外鏇流eccentric annuli helical flow 偏心環(huán)空螺鏇流tangential helical flow turbine [機(jī)]切曏螺鏇流式渦輪helical flow pump 鏇流泵 返回 helical flow