短語(yǔ)詞組短語(yǔ)twin -screw w pump 雙螺桿泵Twin -screw vacuum pump 雙螺桿真空泵Down -hole twin-screw pump 井下雙螺桿泵electric submersible twin -screw pump 電動(dòng)潛油雙螺桿泵 返回 twin-screw pump