短語詞組短語two -screw oil pump 雙螺槳油泵three -screw oil pump 熱電磁泵;三螺鏇槳油泵screw pump oil production 螺桿泵採油screw pump oil production system 螺桿泵採油系統(tǒng)screw pump oil extraction system 螺桿泵採油系統(tǒng)subsurface single -screw oil-well pump 井下單螺桿抽油泵oil field screw pump 油田螺桿泵 返回 screw oil pump