The difference of economical performances between a Shanghai diesel powered and a CNG powered bus is investigated by using life cycle cost assessment method (prices in 2003).
利用生命周期成本评估方法对上海市柴油和CNG公交车的经济性能进行了评价（2003年价格）。
This paper established DME's life cycle assessment model and economic cost model.
建立了二甲醚的生命周期评价模型和经济成本模型。
应用推荐