基本解釋[經(jīng)濟(jì)學(xué)]斗式提升輸送機(jī)詞組短語短語bucket t hoist conveyor 斗式提升輸送機(jī)bucket hoist conveyor更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)斗式提升輸送機(jī)