基本解釋[經(jīng)濟學]拖拉機變速箱操縱系統(tǒng)詞組短語短語tractor transmission control electrical system 拖拉機變速箱操縱機搆電路系統(tǒng)tractor transmission control system更多詞組專業(yè)釋義經(jīng)濟學拖拉機變速箱操縱系統(tǒng)