短語詞組短語permissible draw -down 容許降落水位draw -down ratio 預(yù)拉伸比Curve draw -down 泄降曲線Production pressure draw -down 生產(chǎn)壓差Elevation economic draw -down 經(jīng)濟(jì)泄降標(biāo)高 返回 draw-down