短語詞組短語economical service life 經(jīng)濟(jì)使用期限Economical l life of equipment 設(shè)備經(jīng)濟(jì)壽命Economical life of equipment 設(shè)備經(jīng)濟(jì)壽命economical life of equipmen 設(shè)備經(jīng)濟(jì)壽命economical life period 經(jīng)濟(jì)壽命期economical life time 經(jīng)濟(jì)壽命economical life of tractor 拖拉機(jī)經(jīng)濟(jì)壽命tractor economical life 拖拉機(jī)經(jīng)濟(jì)壽命economical residual service life 經(jīng)濟(jì)賸餘使用壽命 返回 economical life